The singer arrived at N.Y.C. hotspot VIP Room at around 3 a.m. on Sunday where she danced with friends for about an hour.
"She was having a great time. She sang along to a few songs and drank Coronas," says a source.
The Barbados beauty was casually dressed in a crop top, ripped jeans and an oversize Chicago Bulls jacket.
"She was pretty low-key and stuck to her group of friends," said the source.
New York Knicks player Tim Hardaway Jr. was in a nearby booth celebrating his 22nd birthday with teammates Iman Shumpert, J.R. Smith, Kenyon Martin and Phoenix Suns player P.J. Tucker.