Lady Gaga is already known for rocking a platinum look and intense make up.

Saturday night, at former president Bill Clinton’s concert celebrating ten years of the William J. Foundation at the Hollywood Bowl, the pop star hit the stage with '60s movie icon Marilyn Monroe in mind, in blonde bouncy hair and red lips.

The 25-year-old sang “Happy Birthday” while playing a piano, Yahoo! News reports. The saxophone-playing humanitarian, whose actual birthday is August 19, was also celebrating his 65th birthday.

Speaking in a whispery voice, Gaga then introduces “Bill Romance” to an ecstatic Bill and Hillary. At one point in the performance, she actually cat walks over to the family and sings directly to a dancing and hand-clapping Clinton. Watch the performance here.

(Photo: Stephanie Cabral/Yahoo!)