Chris Brown was seen arguing with longtime friend and mentor Usher amid reports that the singers got into a physical altercation.

In a video obtained by TMZ, the “Under the Influence” crooner could be seen allegedly arguing with Teyana Taylor at the Skate Rock City roller rink in Las Vegas during his 34th birthday party Friday.

Usher is then seen trying to talk to Brown, who began cursing while skating away.

According to the outlet, Brown allegedly got upset when Taylor, 32, was ignoring him while he was trying to talk to her at the party.

The “Go Crazy” singer allegedly “started to yell at her” and that’s when Usher intervened.

TMZ claims that Brown “wasn’t having it” and began cursing at both Taylor and the “Let It Burn” singer, 44, before leaving the skating rink with his crew.

Per TMZ, Brown allegedly got upset when Taylor, ignored him while he was trying to talk to her at his party.

Usher reportedly tried to intervene and calm the “Run It!” singer down.

Usher allegedly took off his skates to go find Brown and an eyewitness told TMZ that they saw him go behind a string of charter buses in the parking lot, where the birthday boy and his crew allegedly were.

The witness told the outlet that “a short time later” they allegedly saw Usher emerge with what appeared to be a bloody nose.

Page Six has reached out to both Usher and Brown’s reps but did not immediately hear back.

An eyewitness told the outlet that Usher emerged from behind charter buses with a bloody nose after going to check on Brown and his crew.

The “Under the Influence” singer was celebrating his 34th birthday Friday.

Before the alleged altercation took place, Usher and other guests, including singers Mario and Summer Walker and rapper Bow Wow, were captured on video singing “Happy Birthday” to the “Kiss Kiss” crooner, who turned 34 on May 5.

Usher and Brown have maintained a close relationship since the latter came onto the music scene in 2005. The two have collaborated together on several songs, including “New Flame” and “Party.”

The “New Flame” collaborators have been longtime friends.

Brown has found himself in a heap of legal trouble since he plead guilty to one count of felony assault for beating then-girlfriend Rihanna in 2009.

And in 2017, the “No Guidance” singer’s ex Karrueche Tran was granted a five-year restraining order against him for allegedly becoming aggressive towards her when she wouldn’t return money and gifts he gave during their relationship.

Brown and Usher are supposed to both hit the stage tonight at the Lovers and Friends festival at 6:15 and 7:55 p.m., respectively.