It was a star-studded night at John Mayer's LA concert at The Forum, Friday night. The date was enough to bring out Selena Gomez and The Weeknd, Kendall Jenner, Hailey Baldwin, Meghan Trainor, Paris Jackson and many, many more.

Selena and The Weeknd slipped in quietly through the back door and left the same way, heading back home in their chauffeured SUV, accompanied by three bodyguards. Selena wore her hair up, with a sundress and sneakers, while The Weeknd wore his usual black. Gomez kept her 'do after attending former Wizards of Waverly Place co-star David Henrie's wedding, earlier in the day.

Kendall and Hailey looked like the models they are, decked out in high-end labels. Kendall wore a newsboy cap over her short bob, a denim jacket and Vetements stiletto sock-boots. Kendall was resplendent in Gucci -- a tee, backpack, army pants and bright red heels with a scarf wrapped around her head.

Meghan Trainor was there with her boyfriend Daryl Sabara. Paris Jackson attended with pals -- the young daughter of Michael Jackson was wearing a blush-colored peasant skirt, a belly-bearing top and lace-up boots.

Mayer's The Search for Everything tour has been a hot ticket and is still making the rounds across the US. Last night's show brought in special guest Ryan Adams, who jammed with the soulful crooner to "Come Pick Me Up." Check it out ...