Kesha Was at Taylor Swift's July 4th Weekend Bash Too! (Photo)

There were nearly too many stars to keep track of at Taylor Swift‘s Fourth of July bash this weekend, so one celeb you probably didn’t realize was there is Kesha!

The 29-year-old singer can be seen singing back-up vocals during a performance from Taylor and her BFF Abigail Anderson.

Taylor appears to have hosted a karaoke night and the Haim sisters all broke out their instruments to rock out while Ed Sheeran also hopped on stage for some fun.

“We always knew it would take a Spice Girls song to get me on stage with her,” Abigail wrote on Instagram. “Coming to a city near you…but I’m only accepting 90s hip-hop requests at this current time.”

Taylor famously donated $250,000 to Kesha to support her after a court ruled against the singer in her case with Dr. Luke.