Singer Justin Timberlake reportedly partied with friends to celebrate the birthday of one of his band members.

After his performance at Boston's TD Garden, Timberlake and about 15 of his friends headed to Irish bar J.J. Foley's. The group strolled in around 12:45 a.m. to celebrate the 40th birthday of trumpeter and vocalist Dontae Winslow, reports people.com.

Timberlake is said to have consumed three tequilas and stayed about an hour.

"They were just hanging out. They were awesome. He's been here before," said a bystander.

The staff at Foley's said Timberlake and company gave "awesome" tip for serving them.

"They were awesome tippers. He's super nice," said a staff member."