While Travis Kelce's current flame was all about "The Life Of A Show Girl" on Thursday night ... his former one was far more into the Suite Life.
Kayla Nicole was seen in a SoFi Stadium luxury box during the 49ers' "Thursday Night Football" matchup with the Rams ... partying her tail off with a bunch of San Francisco players' wives and girlfriends.
The Chiefs star's ex rubbed elbows with Claire Kittle, Kristin Juszczyk and others throughout the big football game -- even at one point filming a social media video to Metro Boomin's "Take Me Thru Dere.