Matthew Rutler and Christina Aguilera
David Tonnessen/Anthony Monterotti/Pacific Coast News
06/10/2012 at 01:00 PM EDT
It's Pride Weekend in Los Angeles – and Christina Aguilera
The singer and celeb coach of The Voice
partied at Club Robertson's Rasputin party in West Hollywood on Saturday night with her boyfriend Matthew Rutler and pals to show her support for L.A.'s gay community.
"She was just hanging out with gay friends for Pride. She entered Rasputin through the back entrance on to the dance floor," an onlooker tells PEOPLE. "'Moves Like Jagger' was playing and everybody cheered when she entered. It was really cool. The DJs announced her and everyone was cheering. There were cameras everywhere. She stayed until the end – about an hour and a half."
– Patrick Gomez