The couple kept the good vibes going after J.T.'s concert and hung out at Cavalli Restaurant and Lounge until the wee hours of the night.
E! News learned that the famous duo arrived with a group of over 30 people at 1 a.m. and stayed for a few hours. Night owls!
The group ordered drinks and watched a performance by the venue's Brazilian dancers. Biel seemed to enjoy the act so much that she was even spotted taking pictures of the ladies!
We're told that the lounge stayed open late especially for the very special guests, and that Timberlake brought his own DJ who spun for the party for the remainder of the evening.
At the end of the night, the famous lovebirds paid and left a great tip for their server. Nice!
It seems like birthday celebrations are still ongoing for Biel.
The 32-year-old recently celebrated her special day during an intimate dinner with her hubby at The Forge restaurant in Miami.
Justin and Jessica came in through the main door [around 9 p.m.], and they went directly downstairs to the wine cellar, which is private," a source told E! News of the duo, who were accompanied by Justin's parents, Lynn and Paul.
And what would a birthday dinner be without being serenaded by the "Suit & Tie" singer himself?!
"Justin sang a few lines of 'Happy Birthday' to Jessica," the source revealed, adding that the chef prepared a special Italian wedding cake "because it's Jessica's favorite."