An eyewitness tells ET the former couple was spotted kissing with their arms around each other at the party also attended by Rihanna, Kendall Jenner and Paris Hilton!
Jenner, who recently welcomed her first child with Scott, dated Tyga for almost three years before splitting last year.
DJ Kendall in the house!
Kylie gave fans a preview of her 'cool mom' look before making her first public appearance since giving birth to daughter Stormi.
The new mom is set to host a party during the first weekend of the California music festival.
On Friday, Kim revealed the role she played in Khloe's delivery.
Khloe welcomed her daughter with Tristan Thompson on Thursday.
The 20-year-old reality star is set to make her first post-baby public appearance on Friday.
The reality star and her NBA pro boyfriend, Tristan Thompson, are officially parents.
The 20-year-old reality star gave birth to daughter Stormi just two months ago.
A source recently told ET that while Jenner stayed out of the public eye during her pregnancy, she 'never stopped working.'
The 25-year-old rapper and Kylie Jenner welcomed their first child together in February.
The 20-year-old reality star welcomed her first child with boyfriend Travis Scott in February.
The 2-month-old baby girl was living the life, napping as mom and dad took her on a walk.