I saw Chip Tha Ripper at a Kid Cudi concert.
The concert kicked off with Chip going "whooooose gooooooot weeeeeeeeed" and walking on stage with a mic in one hand and a beer in the other. He was actually really really good. About halfway through the concert a fan passed him a blunt from the crowd and him and cudi both hit it on stage.
And summer songs are generally just a collection of songs that were overlooked/popular from the year.
My guess is going to be a lot of Kid Cudi, BOB, Exhibit C, Blueprint 3 songs, Chiddy Bang, Wale, Gorillaz, Weezy, Wiz Khalifa, etc.