Sandra Bullock Celebrates 50th Birthday at Cowboy Bar

Sandra Bullock celebrated her 50th birthday with some familiar funny ladies.

Late-night host Chelsea Handler was on hand for the Oscar winner's monumental birthday, and shared a few pics on Instagram from the trip to Jackson Hole, Wyoming.

RELATED: Sandra Bullock's BEST Movie Roles

Comedians Whitney Cummings, 31, and Kerri Kenney-Silver, 44, got a little rowdy with Sandy, coining themselves the "Jackson a**holes." An E! News eyewitness says the gals were spotted at the Million Dollar Cowboy Bar around 9 p.m. on Thursday for some music and drinks. "There were probably six to 10 women in the group. It appeared to be a ladies night. They just came in to listen to the band [Southern Soul Allstars]," the eyewitness said.

Sadly for Southern Soul Allstars band member Dianne McManus, she picked the wrong night to give her review of Gravity. "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 told E! "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."

Cummings Instagrammed from the location, writing: "Now I know where all the cowboys have gone. Let's go make some bad choices!"

Handler, 39, also posted: "Happiest birthday."

The gals also posed for a sunset pic, but it's hard to admire the mountain view when there's a pink thong in the shot! Handler of course posted, writing: "Birthday girls."

Bullock turned 50 on Saturday, July 26.