Adele performs onstage during The 59th GRAMMY Awards at STAPLES Center on Feb. 12, 2017 in Los Angeles.

Adele finally returned to the stage and shocked the guests at her best friend's wedding with a flawless performance to round out the happy occasion.

On Saturday night (Feb. 15), Adele was on hand to officiate the nuptials of writer and illustrator Laura Dockrill, a close friend since her school days, and the Maccabees' Hugo White at the Mason's Arm pub in London. The bride wore a gorgeous floral gown, and Adele embraced the theme with her own long, blossom-strewn skirt and fascinator, which can be seen in photos Dockrill shared to Instagram the morning after.

Several guests posted clips of Adele and Dockrill singing and dancing side by side at the Masons Arms, with several friends joining them to dance and laugh throughout the evening.

Florence Welch and Jessie Ware were among the VIP wedding guests, and Welch can be seen living her best life and singing along to every word of Adele's 2011 hit (and the first of hers to reach No. 1 on the Billboard Hot 100 chart) "Rolling in the Deep," which Adele and Dockrill sang together with the band before the evening drew to a close.

Watch Adele sing "Rolling in the Deep" below -- and keep your eyes peeled for a thriving Welch in the background.