It's safe to say that Mariah Carey and Bristol Palin reacted very differently to Barack Obama announcing his support of gay marriage this week.

But while the daughter of a failed Vice Presidential candidate went public with wayward insults of Obama as a father, Glee and Dora the Explorer, Mariah simply went out and partied!

Witnesses say Carey showed up at The Abbey Food and Bar in West Hollywood on Wednesday night, dancing the evening away at the gay nightclub with pal B. Scott.

"She was very nice and gracious," an onlooker at the establishment tells People, adding that the deejay recognized her after awhile and started to play some Mariah classics.

At this, the ladies simply went "crazy" on the dance floor.

Sort of like how Bristol went at Obama's announcement, only not at all.