AceShowbiz -

Earlier this week, fans were left shocked when news broke that Jennifer Lopez had broken up again with her longtime love Casper Smart. Now, more details about their split have been revealed by TMZ, which reports that the split happened after he decided to have fun with his friends instead of accompanying her to a charity event over the weekend.

According to sources connected to the former lovers, J.Lo told Smart that it's really "important" for him to go to businessman Ron Perelman's Hamptons fundraiser to benefit the Apollo Theater with her on Saturday night, August 20.

He, however, ended up choosing to fly to Las Vegas to watch the Conor McGregor and Nate Diaz fight at UFC 202 with his friends. He seemed to have a lot of fun there as he was photographed hanging out with Kanye West as well as UFC announcer Bruce Buffer.

J.Lo was said to be super upset and quickly put an end to her and Smart's 5-year relationship. Sources told TMZ that Casper was unaware that failing to make an appearance at the fundraiser would cause them to split. While at the fight on Saturday, he reportedly told people that he would meet Lopez in New York on the next day.

J.Lo began dating Smart in 2011 when he was still one of her backup dancers on her tour. They had broken up and got back together several times prior to this.

Following their latest split, the former "American Idol" judge appeared to be in good spirits as she stepped out in New York City on Thursday, August 25. She's all smiles when pictured wearing a denim button-down, blue patterned joggers and a pair of brown leather boots.

Jennifer Lopez & Ex-BF Casper Smart Spotted At Separate Outings In New York City https://t.co/9ywQW9LNS3 @loadedcamp pic.twitter.com/SW3rYCE3JJ

— I am Omotayo (@Blogger_Omotayo) August 26, 2016

Her ex, meanwhile, looked gloomy during a solo outing in Soho on the same day. He kept his head down while covering up in a hood, baseball cap and dark shades.