The 32-year-old "This is What You Came For" hitmaker recently attended Lopez's birthday in Las Vegas, who turned 47 this July, and possibly talked about signing a music deal during the party, reported People magazine.
"Jennifer and Calvin discussed a possible music collaboration during her birthday party," a source said.
"They discussed the types of music they both love. Calvin was excited to be at the party, hanging out with Jennifer and chatting with Benny (Medina)," the source said.
Meanwhile, Harris shared a picture of himself with the American-born songstress along with the caption, "Happy birthday Jennifer Lopez, legendary icon - and your show in Vegas is next level.