fountain. Later on, the throne was removed in favor of a pole. At the 2016 Billboard Music Awards, the song was once again on a stripper pole as part of a greatest hits medley. While promoting her ninth studio album Glory in 2016, Spears performed the song at several music festivals worldwide, including the iHeartRadio Music Festival, Apple Music Festival, KIIS-FM Jingle Ball, and the 99.7's Triple Ho Show. "I'm a Slave 4 U" was performed on the 2017 Britney: Live in Concert Asian tour, as well as on the Piece of Me Tour in 2018, which covered North America and Europe. According to rehearsal videos published at Spears's social media accounts in late 2018, "I'm a Slave 4 U" was set to be performed at her planned residency Britney: Domination prior to its cancellation. Cover versions "I'm a Slave 4 U" was covered by the musical television show Glee in the episode "Britney/Brittany", sung by Heather Morris in her singing debut. In a dream sequence, Morris' character Brittany Pierce sings the song, while recreating several iconic looks from Spears' videos: the red catsuit from "Oops!... I Did It Again", the outfit with a snake from Spears' 2001 performance at the VMAs, and the white diamond bodysuit from "Toxic". Morris also performed the song during the live 2011 Glee Tour. In 2015, Brazilian singers Anitta and Lorena Simpson performed the song at Anitta's special concert at Chá da Alice when the singer reproduced the original choreography and also sported a white python on stage. Legacy and influence "I'm a Slave 4 U" was widely seen as being a departure from Spears' girl next door image and signature bubblegum pop sound from her previous two albums ...Baby One More Time and Oops!... I Did It Again – the sound of the single leans more towards "urban pop" and R&B, and the accompanying video and live performances are more overtly sexual. Upon its release, the song and video - as well as Spears' performance at the 2001 MTV Video Music Awards - were heavily criticized for their overt sexual nature as well as for Spears only being 19 years old at the time and a self-proclaimed virgin. Many critics at the time compared the song and its video to that of Prince and Janet Jackson. Some critics also noted similarities in Spears' slight transition from bubblegum pop and more confident overt sexuality