#vegasnights happy bday @jlo #southbronx @kimkardashian #turnuptime 🎉🎉 #mc4

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Kim Kardashian went to pal Jennifer Lopez’s 47th birthday party at Caesar’s Palace in Las Vegas on Friday night, and not only did she spend plenty of quality time with J. Lo, but she had a lengthy discussion with Calvin Harris at the soiree. You KNOW what these two were talking about!

A source tells Us Weekly that the duo were "smiling and chatting for awhile," and they even posed for a group shot later in the evening. After that Kim hosted a bachelorette party for one of her girlfriends at Hakkasan Nightclub at the MGM Grand, and she Snapchatted a video of herself and a gal pal singing along to husband Kanye West’s song “Famous." Kim's friend covered her mouth and pretended to be shocked when the controversial "I made that bitch famous" lyric came up, but Kim happily sang along.

Kim released an audio clip last week, in which we hear Kanye and Taylor Swift discussing the aforementioned song lyrics and Taylor seemingly giving Yeezy the go ahead to use them, but it's important to note that you don't actually hear the b-word on the recording. Taylor posted a message on Instagram shortly thereafter slamming Kim, and so far the star hasn't had a legit rebuttal. Hmm...

While Calvin and Taylor's feud has cooled down a bit, he did share a Snapchat video of himself rapping along to Kanye’s song “That Part” while waving a frying pan in the air on Saturday. Maybe he'll be singing along to "Famous" next?