Instagram user KyledeVolle uploaded the pic of Mossy and Reets locking lips, writing: "My 2 fav blondes @ritaora #TheMoss x"
The girls went to watch Jay-Z perform his Magner Carter tour at the O2, but started out at the Rimmel London 180 Years of Cool party at the London Film Museum, where they showed off differing degrees of style success.
Rita went all matchy-matchy in a head-to-to tartan Moschino trouser suit, bow tie and ghetto gold bling (yep, it sounds like a fashion fail, and guess what? It was).
Kate, meanwhile, was all kind's of cool (as ever) in a studded velvet cape, matching diamante top, skinny jeans and suede stiletto boots.
And let's not forget Georgia May Jagger, who practically stole the show in her sassy sequin 20s-style minidress and HUGE curls.
Mossy fan? Course you are...