When you're sharing the stage with President Barack Obama, you kind of have to wear clothes.
And that was the unlikely matchup as the 44th president of the United States joked that he was the supporting act for the oft-pantless Lady Gaga, who performed at the Human Rights Campaign dinner Saturday night, before the National Equality March in Washington, D.C.
"It is a privilege to be here tonight to open for Lady Gaga," said the Nobel Peace Prize-winning president. "I've made it."
The diva ditched her wacky masks and leotards for a more serious black dress and John Lennon-esque shades as she performed the singer's "Imagine," changing the lyrics to reference Matthew Shepard's 1998 murder.
The college student's death has been a rallying cry for the gay rights movement. His parents, Judy and Dennis Shepard, were honored with the Edward M. Kennedy National Leadership Award at the dinner.
"I'm not going to play one of my songs tonight, because tonight is not about me," Gaga said before she sang and played a white grand piano. "It's about you."
Castmembers from Fox's Glee also performed.
See Lady Gaga's less conservative style in her Fashion Spotlight gallery.