also i have a remix of if i die 2nite which has da brat talking about pac blended in the outro and she is saying how much he influenced people and she says we'll all miss him and love him
that part about a song with da brat is a rumor for all i know,, pac said in a interview that he did a remix for whatz ya phone with mclyte beat,, and that song is thug in me og....
LL Cool J - Biggie did 'who shot ya' (which is a blatant pac diss) and LL followed it up with 'i shot ya'...so I guess pac thought that was a diss. I think he also called Kidada a bitch in a song or interview or something.
JayZ - did 'Brooklyn's Finest' with Biggie and I think if you look at jay's lyrics there are subliminal disses to pac. He also disses him on 'I love the dough' - which is on biggie's Life After Death album.
I'm pretty sure he hated on Da Brat because of her association with biggie and some of the eastside rappers he didn't like. Just like if you were in a war, someone riding for opposing side would then become your enemy.