Inside Sandra Bullock’s 50th birthday cowgirl bash in Wyoming

Sandra Bullock turned the big 5-0 this weekend (can you believe it?) in style. She headed off to Wyoming with her sister Gesine, Chelsea Handler, Whitney Cummings, and other gal pals for a long weekend.

They kicked off festivities at the Million Dollar Cowboy Bar in Jackson Hole, but kept the party going through her birthday on Saturday.

They said they kept it quiet because she sometimes likes to just act like a normal person,” Southern Soul Allstars member Dianne McManus told People about performing for Bullock at the Cowboy Bar. “They came out and danced and took a bunch of pictures.”

Dianne told E! Online that she even made a crack about Sandra’s movie Gravity before she knew she was in the house. “Before I knew she was in the audience at the Million Dollar Cowboy Bar, I said on stage I hated the movie Gravity and gave it a pretty bad review, saying why would you do a movie where George Clooney died in the first 30 minutes and she didn’t even kiss him?” she said. “Obviously Sandra, who was sitting right there has a good sense of humor and is a good sport since she had to listen to me say all of that…I would have never done that if I known she was in the audience.”