After dumping Rihanna and getting back together with Karrueche Tran, Chris Brown has really enjoyed his freedom during last weekend's his Anaheim shows.

He brought Nicki Minaj out on stage and accepted a fan's panties all on the same action-packed Saturday night.

While performing at Heat nightclub in Anaheim on Saturday, Chris was going throw his set list when he noticed a young woman in the front row holding up a white pair of undies.

TMZ captured video of the event, below, but their sources are telling them the club was very loud and hot and people were sweating like crazy.

So that's why Brown's reaction to the panties is so bizarre. Unless they were not worn during the show and were instead a gift from the lovely fan.

But Brown aws also headlining Power 106's PowerHouse 2013 concert at Anaheim's Honda Center on Saturday night. What a busy pop star?

Brown dazzled the crowd with many of his solo hits including the newest, "Fine China," but he really sent the crowd into hysterics when he brought out surprise guest, Nicki Minaj.

The crowd got crazy as the former "American Idol" judge joined Chris Brown to perform DJ Khaleed's "Take It to the Head."

Brown continued to dance with Minaj for her own tracks, as the busy 30-year-old emcee performed "Beez in the Trap," and "High School."

"Thanks for showing love at powerhouse!!! Means a lot to me. Thank you," Brown told Minaj as she departed the stage.

The 24-year-old former boyfriend of Rihanna went on Twitter to thank the California crowd later in the night, with Brown writing on Twitter the next day, "California i appreciate you! #Powerhouse was so much fun! Thanks to everyone who came out last night!"

Previously, A$AP Rocky, Tyga and Future also rocked the PowerHouse 2013 event.

Both Brown and Minaj will next be seen at the 2013 BET Awards next Sunday night with the two musicians performing alongside Mariah Carey, Miguel, R. Kelly and Kendrick Lamar