Bionic is the singer’s first studio album in four years since Back to Basics (2006) and was preceded by lead single, “Not Myself Tonight” which reached top 40 in most countries. Upon release, the album received mixed reviews from music critics. Some praised Aguilera for being daring and experimental whilst others felt that she was heavily influenced by her collaborators which resulted in inconsistency. In the United States it debuted at number three on the Billboard 200 albums chart with sales of 110,000 copies. Bionic made UK chart history by first debuting at number one with lowest number of copies sold in eight years and then by registering the largest weekly decline for a number one album.