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6. LADY GAGA
The Fame

2010 Sales: 1,591,000
according to Nielsen SoundScan.

Lady Gaga may face a "digital death" in the name of charity later this week, but she squeezed in another big statement via YouTube last night (Nov. 29). The singer continued her ongoing support of a repeal to the "Don't Ask, Don't Tell" policy regarding openly gay members of the military with a PSA-type video filmed in black and white.

Video: Lady Gaga's "Don't Ask, Don't Tell" Repeal Message

"Right now, we're looking at tomorrow [Tuesday] being a very important day for you guys all to really be paying attention," Gaga told her "Little Monsters," referring to the Pentagon's release of its long-awaited report on the repeal of "Don't Ask, Don't Tell" (DADT) today (Nov. 30).

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The timing could not be more crucial, with a "DADT" repeal hearing expected soon, not to mention the Democrats losing control of the House of Representatives to the Republicans in January.

"We've known for many years that an overwhelming majority of Americans are ready to repeal," Gaga says in the backstage video."Senators, you have been put on notice by me and by the people of this country. You said you would debate and address this law when the Pentagon returned with a strategy, and tomorrow morning you will have it. So will you keep your word? Please keep your word."

Lady Gaga Releases Anti-'Don't Ask Don't Tell' Video

Tugging at heart strings, Gaga added: "Kids are being led to believe that it's OK to hate and condemn based on our differences, and this recent horrific news of gay suicides is really proof of our social repression -- and ultimately government repression -- that is killing our youth."

Although some may think Lady Gaga lives in her own world, the singer remained realistic throughout her message, adding that she realizes that "political activism when you're a pop singer can be kind of trivial," but that the repeal of "DADT" is near and dear to her heart through her fanbase.

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Gaga's "DADT" PSA is just the latest update to the singer's continued support of the issue. She appeared at the 2010 Video Music Awards accompanied by LGBT members of the military, and spoke out against the homophobia behind "DADT" at a rally in Maine in September.