"Meghan Trainor was all about the jam session -- with rising star Tori Kelly -- at a private party Thursday night celebrating the latter's debut album, "Unbreakable Smile."
With Kelly on amplified acoustic guitar, the ladies broke down "All About That Bass" on a tiny corner stage in front of an appreciative invite-only crowd, and then the star of the evening made a genuine appeal to her audience:
"I know there's a lot of musicians in this room," the 22-year-old said. "I'm leaving these mikes open ... I'm just saying ..."
It was a pretty safe bet: Guests included Kelly's "I Was Made For Loving You" collaborator Ed Sheeran, who navigated through the paparazzi and fans outside the Nice Guy lounge to hit the scene around 11 p.