"#1Nite (One Night)" is a song by American dance rock band Cobra Starship, featuring Canadian singer-songwriter My Name Is Kay.

[5] The song was originally titled as "One Night", however Gabe Saporta made a last minute decision to add a hashtag after it was suggested by the group's manager Alex Sarti who thought "could be an automatic trending topic.

Aubrey Welbers of Alternative Press stated, "Thanks to Auto-Tune and a recycled beat, it would be tough to identify '#1Nite' as a Cobra Starship song if it were played between any of the ubiquitous empty dance tunes heard in clubs.

"[10] Mikael Wood of Entertainment Weekly remarked, "The hooks here are undeniably sharp — especially on '#1Nite (One Night)', which swipes the melody from Usher's 'DJ Got Us Fallin' in Love'.

[14] The video was shot in Las Vegas and portrays Gabe Saporta and My Name Is Kay as a couple, visiting a convenience mart, the arcade and partying at Caesars Palace.