Star-Studded Birthday Bash for Bill Clinton

Star-Studded Birthday Bash for Bill Clinton

Lady Gaga was channeling Marilyn Monroe dressed in skintight, nude colored pants and blonde wig as she serenaded Bill Clinton at his 65th birthday bash.

"Tonight, I just thought we'd all get caught up in a little 'Bill Romance,' " said Gaga.

Some say it echoed back to Marilyn Monroe in 1962 seductively singing for President John F. Kennedy.

Lady Gaga changed the title of her hit song "Bad Romance" to "Bill Romance."  The president was clearly delighted, and good sports that they are, so were Chelsea and Hillary.

The star-studded birthday bash was a fundraiser for President Clinton's Global Initiative, now in its 10th year. Usher and Stevie Wonder were among the stars who performed. Ashton Kutcher was also there. His charity, the DNA Foundation, works closely with Bill Clinton.

Kutcher came alone. There was no sign of Demi Moore as rumors of a split continue to swirl. But he was wearing his wedding ring.

It was Gaga though, who stole the night, with her sexy Marilyn moment.