I feel like I am on the morally wrong side of this, but
Mod Sun seems very unappealing to me on every level, so I can't really fault her choice. Though this romance with Tyga will probably not end well, she will most likely have fun.
I just looked them up out of curiosity, I thought Mod Sun must be in his mid-40s from his looks (ie too old to be playing dress up and singing silly songs), but he is only 35, while Avril is 38. She plays dress up and sings silly songs also, but she is beautiful and more charismatic, so I guess I give her more leeway to act silly?