11 – Lady Gaga released "Born This Way" the first single off her new album of the same name. It became the fastest iTunes single at the time. It later went on to remain number 1 on the Billboard Hot 100 for 6 consecutive weeks, as well as the 1,000th number-one single in chart's history.
12 – Katy Perry, with her fourth single from Teenage Dream, "E.T.", becomes the only artist in history to spend 52 consecutive weeks in the top ten of the Billboard Hot 100.[4]
23 – Lady Gaga released her sophomore studio album, Born This Way. It sold 524,000 copies on its first day, and one million copies on its first week, making Gaga the first person to do that.
15 – Blink-182 started their 20th Anniversary Tour. The tour visited Canada in 2011, the United States and Europe in 2012 and Australia in 2013.
27 – "Last Friday Night (T.G.I.F.)" by Katy Perry becomes the fifth single from the album Teenage Dream to reach #1 on the Billboard Hot 100, tying Michael Jackson's record for the most singles from one album to do so. She is the second artist and only woman in history to achieve this.
2 – It was announced that drummer Mike Pedicone was kicked out of My Chemical Romance due to Pedicone stealing from the band. No charges were pressed.
17 – With Katy Perry's fifth single from Teenage Dream, "Last Friday Night (T.G.I.F.)", she completed 69 consecutive weeks inside the top ten, more than any artist in history.[6]
24 – "I Wanna Go" by Britney Spears became Spears's 21st top-forty single, the third-highest female total since her first week on the chart on November 21, 1998, and only behind Taylor Swift with 27 and Rihanna with 22. It also broke the record for longest duration between the first and last # 1 on the pop chart.
27 – Blink-182 released their sixth studio album Neighborhoods. This is the first album they recorded together since their indefinite hiatus in 2005. It debuted at number 2 on the Billboard 200. This was their last album with Tom DeLonge until he returned to the band in 2022.
6 – Korn's tenth studio album, The Path of Totality, debuts at number 10 on the Billboard 200 with 55,000 copies sold in its first week. This album marks the beginning of a new direction for nu metal, with artists like Skrillex and many more contributing to the album with dub step and more electronic sounds.