Weird similarities with...

Friends with Benefits

Like, weirdly specific similarities.

they both introduce a song (Closing Time and Uptown Girl) both introduce a show (flash mob and basketball dance thing) and one character uses a combo of those to win the other back at the end.
One of the leads works in print journalism. The leads meet through work. One of them is friends with a famous athlete who plays himself. The athlete has one specific joke they have for every scene (to FwB's credit, Shaun White isn't in the movie much). One of them has a sick father. A parent is partially responsible for the female character's relationship problems. A sister of one of the lead characters encourages them to settle down. Both movies have a fake movie with famous actors that is reincorporated multiple times.