Adele usually flies under the radar, socially speaking, since she considers herself a singer not a pop star. But she had a date night with baby daddy Simon Konecki at Lady Gaga's private show in London on Friday, Dec. 6. How sweet, right?

Gaga performed an intimate, dripping-with-celebs set at Annabel's, a members-only club. Adele was there, in all black, her signature shade, with her hair all thrown off her face in a bun. She and Konecki made a stealth entrance, entering via a back door.

Other attendees included Emma Watson, Eddie Redmayne -- once rumored to be a Taylor Swift BF-- and Jonathan Rhys Meyers, as well as Sting.

A source said that Adele looked happy to be out, since she has spent much of 2013 enjoying life as mom to her firstborn son, Angelo. "Simon kissed Adele on the cheek and had his arm around her waist at many times of the night," the insider said.

We hope they enjoying the songs of Lady Gaga!