Kim Kardashian West chatted to Calvin Harris at Jennifer Lopez's birthday party on Friday (22.07.16).

Kim Kardashian West

Kim Kardashian West

The 'Keeping Up With the Kardashians' star - who last week leaked footage of the DJ's ex-girlfriend Taylor Swift talking to Kanye West about his controversial track 'Famous' - was seen locked in conversation with the 'Summer' hitmaker at the Las Vegas bash, though it is unclear what they were discussing.

A source told Us Weekly magazine: "Kim and Calvin did talk and interact, smiling and chatting for awhile."

Kim - who presented the birthday girl with a cake at the bash, which took place after Jennifer's 'All I Have' show at Caesar's Palace - reignited her and husband Kanye's feud with Taylor last week when she leaked the footage, prompting the 'Bad Blood' singer to hit back and insists she had never given the rapper "permission" to reference her in the track as she had no idea he referred to her as a "b***h".

Meanwhile, Calvin slammed his former lover - who is now dating Tom Hiddleston - in a lengthy twitter rant after it emerged she had secretly written his song 'This Is What You Came For', blasting her and her team for "going out of their way to try and make ME look bad at this stage."

He added: "I figure if you're happy in your new relationship you should focus on that instead of trying to tear your ex bf down for something to do.

"I know you're off tour and you need someone new to try and bury like Katy [Perry] ETC but I'm not that guy, sorry. I won't allow it. Please focus on the positive aspects of YOUR life because you've earned a great one. God bless everyone have a beautiful day."

Meanwhile, other guests at Friday's party included French Montana, Cristiano Ronaldo, Maria Menounos, John Stamos, Iggy Azalea and LA Reid.

Jennifer - who turned 47 on Sunday (24.07.16) - ended the evening by joining singer Tank at the piano to perform songs including 'End of the Road' and 'My Girl'.