Lady Gaga served as the headliner during a lavish wedding for Russian businessman Eldar Osmanov's daughter on Saturday (01Jul17).
Gaga headlined Lolita Osmanova's big day at the Dolby Theater in Los Angeles, where she surprised the bride and groom with a set of hits.
The Poker face singer hit the stage in a red gown for her private concert at the home of the Oscars.
R&B star Jason Derulo also performed a set of his best known tracks.
The evening, hosted by TV personalities Ksenia Sobchak and Andrey Malakhov, reportedly set back the bride's dad Russian energy oligarch Osmanov back $10 million (GBP7.7 million).
Reports suggest he spent $2 million (GBP1.5 million) on the night's entertainment and over $500,000 on flowers that filled the fabled theater.
Lolita, 22, wed Gasper Avdolyan, the 29-year-old son of telecoms millionaire Albert Avdolyan.