Photo: Jerritt Clark/Stoli Vodka

Stoli Vodka wished Lance Bass a happy 40th birthday with three custom cocktails – the “Drop the Bass,” “*NSYNCO de Mayo” and “Cos-Mule-Naut” – made from Stoli Lime, Stoli Cucumber and Stoli Premium, respectively Credit: Jerritt Clark/Stoli Vodka

Stoli Vodka engineered special custom cocktails for the occasion, with names like “Drop the Bass” (made with Stoli Lime) and “*NSYNCO de Mayo” (with Stoli Cucumber). And, of course, no birthday party would be complete with a cake — and Bass got a triple decker!

A guest toldEntertainment Tonightthat the revelers were belting vintage bops — including someSpice Girlsclassics. “The room was singing ’90s hits the top of our lungs and with a packed dance floor. So much fun!”

Jerritt Clark/Stoli Vodka

Stoli Vodka wished Lance Bass a happy 40th birthday with three custom cocktails – the “Drop the Bass,” “*NSYNCO de Mayo” and “Cos-Mule-Naut” – made from Stoli Lime, Stoli Cucumber and Stoli Premium, respectively Credit: Jerritt Clark/Stoli Vodka

Bass shared numerous photos from the event to his Instagram on Sunday. “Best. Birthday. EVER!!!” he captioned some party shots. “@roccosweho was on 🔥with some of my favorite people on Earth! My friends know how to throw one hell of a party. Thank you! ❤️ 📷:@guapcityproductions #MayThe40thBeWithYou.”

O-Town also shared a sweet group shot to their official Instagram page.

“We had a great time celebrating our friend@lancebasslast night! What an amazing birthday party!” they captioned the pic.

Grande began singing her hit “Break Up With Your Girlfriend, I’m Bored” — which samples an old ‘NSYNC song, “It Makes Me Ill,” from their 2000 album,No Strings Attached —when 4/5ths of the group (minusJustin Timberlake) appeared.

“I’ve been waiting all my motherf—ing life to say this: ‘NSYNC,” Grande said before she and the group performed the 1997 classic, “Tearin’ Up My Heart.”

“Coachella, this has been a dream of ours, thank you Ariana!” the band said from the stage.

source: people.com