Kings Of Leon went on a drinks bender ahead of the performance at London's O2 Arena last night (June 1).
The band delighted fans at the twice-rescheduled date, which was originally postponed due to a fire at the venue last year.
According to The Sun, the Nashville band prepared for the gig by spending a night at a Mayfair Club where they ordered 400 shots of tequila for each guest.
"The bar was filled with shot glasses and it took staff ages to top up every glass,” a source told the Sun. "Everyone in the club was looking on and it was a real spectacle."
The pricey round set the band back £3000, which they paid on a credit card.
Kings Of Leon are currently in Europe to perform they stadium and festival dates.