2 Girls 1 Cup
The Codename: Kids Next Door episode "Operation: E.L.E.C.T.I.O.N.S." has Numbuh 4 making Numbuh 5 react to 2 Girls 1 Cup as part of a viral video for a viral video contest at Gallagher Elementary, later, Numbuh 4 himself gets forced to watch 2 Girls 1 Cup after ruining Joey Giblin's big moment during the contest.