Britney Spears was able to put a "great" show Thursday night, Aug. 28, a day after she revealed on Twitter that she was back to being single again.

"She was full of energy and put on a great show," a source told E! News of the 32-year-old pop star, who is also scheduled to perform Saturday and Sunday night at Planet Hollywood Resort & Casino in Las Vegas as part of her two-year residency show, titled "Britney: Piece of Me."

"She looked amazing and seemed to be doing great," a source told People. Another tipster dished that the "Oops!... I Did It Again" singer is "upset, but she's focusing on her show right now" and "moving on."

Before she hit the stage Thursday, the mother of two posted a funny Instagram video, in which she seems to address the breakup news.

"Okay, if you ever have a really, really s---ty day, find someone with shoes with hearts on them," she said in the clip before turning the camera away from herself and towards a friend wearing a heart-adorned Comme des Garçons sneakers. "Made my day!" the singer added with a grin.

Spears broke up with now former boyfriend David Lucado after she discovered a video of him cheating, TMZ reported.

Sources told the celebrity gossip website that the Virginia-based lawyer is seen in the clip "making out" with another woman and dancing with her. The clip was reportedly taken earlier this month.

A representative for Spear's father, Jamie, recently told TMZ that he immediately contacted the agency that was selling the controversial cheating video the moment he learned about it, and splashed a "substantial" amount of money to secure it. He then reportedly showed it to her daughter who, after seeing the footage, instantly declared her relationship with Lucado over.

Spears and Lucado started dating in March 2013 - just two months after the singer and Jason Trawick mutually ended their engagement.