'The Monica Seles Challenge: 5 Weeks to Jump Start Your Life' to inspire listeners to live a happier, healthier, more confident life Seles to welcome athletes, celebrities, real women and other special guests in studio

NEW YORK, Sept 03, 2008 /PRNewswire-FirstCall via COMTEX News Network/ -- SIRIUS XM Radio (Nasdaq: SIRI)
announced today that internationally acclaimed tennis superstar Monica Seles
will host an exclusive live call-in show aimed at empowering women everywhere
to lead their best life. The Monica Seles Challenge: 5 Weeks to Jump Start
Your Life will air in five weekly installments airing every Thursday from
September 4th through October 2nd from 1:00 - 3:00 pm ET on SIRIUS Stars
channel 102. Seles will host the show from SIRIUS XM Radio's Rockefeller
Center studios.

(Logo: http://www.newscom.com/cgi-bin/prnh/20080819/NYTU044LOGO )

Seles has long been a role model for women and on SIRIUS she will have a
forum to speak candidly about both the troubles and successes she faced in her
own life and how these experiences made her stronger. With The Monica Seles
Challenge, Seles encourages listeners to join her on a five-week journey
toward feeling strong, beautiful, happy and healthy - on the inside and out.
Seles' goal is to help women realize their best possible selves across all
aspects of their lives, personal, professional, emotional and beyond.

Seles will welcome expert guests, athletes, celebrities and real women and
will take calls from around the country.

"I love radio and the unique way it has to reach out to people with a real
and personal exchange of ideas and stories," said Monica Seles. "SIRIUS has
provided just such an opportunity for me, my studio guests and the SIRIUS
audience to share our life experiences, learn from them, and hopefully forge
ahead into a happier and healthier future."

"Monica Seles is an extraordinary person whose passion, determination and
courage - both on and off the court - shaped her into the world-class athlete
and woman she is today," said Scott Greenstein, President and Chief Content
Officer, SIRIUS XM Radio. "On SIRIUS, these qualities will translate into
compelling radio as she empowers and inspires listeners across the country."

Over Seles' extraordinary tennis career, she earned nine Grand Slam titles
and won 53 singles and six doubles tournaments. She first became No. 1 in the
world in March 1991. Seles was No. 1 for 178 weeks during the next two years-
the youngest No. 1 ever at the time- until tragedy struck in April 1993 when
she was stabbed in the back by a deranged fan during a match in Germany. She
wasn't able to play again for more than two years. When she returned to
tennis, she won hearts with her comeback win at the Canadian Open and then
reached the US Open Final the following month. Remarkably, she won her ninth
Grand Slam title at the Australian Open in January 1996. Seles joined the cast
of ABC-TV's hit "Dancing with the Stars" in 2008. Seles is currently writing
her memoir, Getting a Grip: On My Body, My Mind, My Self, in which she
explores her remarkable journey of tennis, fame, tragedy, loss and
self-discovery. Her book is scheduled for publication in March 2009 by Avery,
an imprint of Penguin Group (USA).

About SIRIUS XM Radio

SIRIUS XM Radio is America's satellite radio company delivering "The Best
Radio on Radio" to more than 18 million subscribers, including 100% commercial
free music, and premier sports, news, talk, entertainment, traffic and
weather.

SIRIUS XM Radio has exclusive content relationships with an array of
personalities and artists, including Howard Stern, Oprah, Martha Stewart,
Jimmy Buffett, Elvis, Jamie Foxx, Barbara Walters, Frank Sinatra, Opie &
Anthony, The Grateful Dead, Willie Nelson, Bob Dylan, Dale Earnhardt Jr., Tom
Petty, and Bob Edwards. SIRIUS XM Radio is the leader in sports programming as
the Official Satellite Radio Partner of the NFL, Major League Baseball,
NASCAR, NHL, and PGA Tour, and broadcasts major college sports.

SIRIUS XM Radio has exclusive arrangements with every major automaker.
SIRIUS XM Radio products are available at shop.sirius.com and
shop.xmradio.com, and at retail locations nationwide, including Best Buy,
Circuit City, RadioShack, Target, Sam's Club, and Wal-Mart.

SIRIUS XM Radio also offers SIRIUS Backseat TV, the first ever live
in-vehicle rear seat entertainment featuring Nickelodeon, Disney Channel and
Cartoon Network; XM NavTraffic service for GPS navigation systems delivers
real-time traffic information, including accidents and road construction, for
more than 80 North American markets.

This communication contains "forward-looking statements" within the
meaning of the Private Securities Litigation Reform Act of 1995. Such
statements include, but are not limited to, statements about the benefits of
the business combination transaction involving Sirius XM Radio Inc. and XM
Satellite Radio Holdings Inc., including potential synergies and cost savings
and the timing thereof, future financial and operating results, the combined
company's plans, objectives, expectations and intentions with respect to
future operations, products and services; and other statements identified by
words such as "anticipate," "believe," "plan," "estimate," "expect," "intend,"
"will," "should," "may," or words of similar meaning. Such forward-looking
statements are based upon the current beliefs and expectations of SIRIUS' and
XM's management and are inherently subject to significant business, economic
and competitive uncertainties and contingencies, many of which are difficult
to predict and generally beyond the control of SIRIUS and XM. Actual results
may differ materially from the results anticipated in these forward-looking
statements.

The following factors, among others, could cause actual results to differ
materially from the anticipated results or other expectations expressed in the
forward-looking statement: general business and economic conditions; the
performance of financial markets and interest rates; the ability to obtain
governmental approvals of the transaction on a timely basis; the failure to
realize synergies and cost-savings from the transaction or delay in
realization thereof; the businesses of SIRIUS and XM may not be combined
successfully, or such combination may take longer, be more difficult,
time-consuming or costly to accomplish than expected; and operating costs and
business disruption following the merger, including adverse effects on
employee retention and on our business relationships with third parties,
including manufacturers of radios, retailers, automakers and programming
providers. Additional factors that could cause SIRIUS' and XM's results to
differ materially from those described in the forward-looking statements can
be found in SIRIUS' and XM's Annual Reports on Form 10-K for the year ended
December 31, 2007 and their respective Quarterly Reports on Form 10-Q for the
Quarter ended June 30, 2008, all of which are filed with the Securities and
Exchange Commission (the "SEC") and available at the SEC's Internet site
(http://www.sec.gov). The information set forth herein speaks only as of the
date hereof, and SIRIUS and XM disclaim any intention or obligation to update
any forward looking statements as a result of developments occurring after the
date of this communication.

    P-SIRI

    Contact for SIRIUS XM Radio:
    Hillary Schupf
    SIRIUS
    212 901 6739
    hschupf@siriusradio.com

SOURCE SIRIUS XM Radio

http://www.sirius.com

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