What are best friends for??

Adele officiated her pal Laura Dockrill's wedding to The Maccabees musician Hugo White at the Mason's Arms pub in London on Saturday. She later grabbed a mic and performed songs such as her breakout single "Rolling In The Deep" and the Spice Girls' "Spice Up Your Life," as seen in Instagram videos posted by guests, including Chernobyl actor Robert Emms. The bride, partygoers and fellow singer Florence Welch also joined Adele onstage.