The nasty custody battle between Usher Raymond and his ex-wife Tameka Foster Glover Raymond resumed in Fulton County Court today (May 20, 2012).

You may recall Tameka hit the stand a few weeks ago and admitted to stating she’d “F*ck up” Usher and his new boo during a heated argument and recently it was revealed that it was Usher who initiated the suit to obtain full custody of the couple’s two young sons, Usher V and Naviyd.

Earlier today it was Usher’s turn to make an appearance on the stand after performing just last night at the Billboard Music Awards.

[READ: Hot or Not? Usher Raymond’s Baby Blue Billboard Suit + “Scream” Performance – PHOTOS/VIDEO]

While he changed his baby blue suit for a more conservative dark gray, the Grammy award-winning singer went in on his ex-wife, accusing her of viciously assaulting former side chick turnt main chick turnt manager, Grace Miguel.

Watch exclusive video of Usher on the stand below…

VIDEO: Usher Raymond Takes the Stand Against Tameka

Usher and Tameka are battling over custody of their two kids and it was Usher who initially filed the suit seeking full custody of the boys.

According to TMZ:

Tameka once went ballistic and “wanted to fight” … when he showed up at her house with his new sidepiece.

Ush testified Tameka walked to his car and said, “I’m gonna kick your ass. Bitch get out of the car. How dare you bring this woman into my subdivision in my house?”

He added, “She continued to spit. At this point she pulled the door open, tried to swing at her.”

Usher claims he had to get out of the car and block Tameka … who then hit him. Usher said he pleaded with Tameka to calm down, but claims “she threw a plate of food at the car” … as he fled the situation

Usher testifies about his ex going through nanny after nanny and said he worries about who is caring for his kids. He also testified Tameka has a violent history and said she sent a threatening email to a friend of his and later attacked her.

The couple married in 2007. Their marriage lasted less than two years. This doesn’t look like it’s going to end well….

Team Usher? Team Tameka?