During an interview this morning on the Power 105 Morning Show, T-Pain explained why he dissed Jay-Z:

"This aint the first time I done said it. Nothing has changed. I called Jay and I said can you come out on my set [during Summer Jam] and do the D.O.A song, it’ll be a big look for me and you. I embrace the song, I love the song and don’t get me wrong Jay-z is the best in the game period. I would never say anything different. At that time he said “yo I’m triple booked, I’m in Switzerland right now, I can’t do it”. Then I’m ready to go on stage after Jeezy set and they said “hold on, Jay-z is about to come out with Jeezy” and I said ” Jay-z is in switzerland”. They say “no he’s not, he’s right there” and I look to the side and there’s Jay-z. So he gets on the stage and when he gets to the part where he says “I don’t need anyone smiling at this” he pointed at me and then at the end of the song when I tried to shake his hand, he turned around, gave the mic to someone and said “good riddance”."

As for Fabolous, T-Pain says if there was a problem Fab should have approached him:

“I mean if somebody had a problem with Akon and they start dissin him then Im goin back stage and figure whats up.”(Source: Necole Bitchie)

According to Necole, T-Pain and Fabolous have patched things up since. Check out the Summer Jam performance T-Pain is referring to after the jump. To listen to the full T-Pain interview click here.