Addison Rae couldn't be more excited for her pal Kourtney Kardashian! The 20-year-old TikTok star presented at Sunday's MTV Movie & TV Awards alongside her future co-star Tanner Buchanan, where she couldn't help but gush to ET's Katie Krause about her friend's new romance. «I'm obsessed,» she tells ET of Kourtney's relationship with drummer Travis Barker. «I'm obsessed.