Mr. Simple

Mr. Simple
Digital and A version cover.
Studio album by Super Junior
Released	3 August 2011 (2011-08-03)
Recorded	June–July 2011
Studio	SM Studios, Seoul
Genre	K-pop synth-pop R&B pop-rock
Length	47:44 (version A) 47:41 (version B) 61:12 (repackaged)
Language	Korean
Label	SM KMP
Producer	Lee Soo-man
Super Junior chronology
Bonamana (2010) Mr. Simple (2011) Sexy, Free & Single (2012)
Singles from Mr. Simple
"Mr. Simple" Released: 2 August 2011 "Superman" Released: 22 August 2011
Repackaged edition cover
Digital cover
Singles from A-Cha
"A-Cha" Released: 19 September 2011

Mr. Simple (reissue name A-Cha) is the fifth studio album by the South Korean boy band Super Junior. It was released on 3 August 2011, by SM Entertainment, distributed by KMP Holdings and digitally release on 2 August.^[1] On 19 September 2011, a repackaged edition was released, re-titled A-Cha. It features four new tracks including title track "A-Cha" and "Superman" which was previously released in version B only. This is the group's second album that features ten of the original 13 members and the first being their previous album, Bonamana (2010).

At the year end award shows of 2011, the album won the Disk Daesang Award at the 26th Golden Disk Awards and 21st Seoul Music Awards, as well as the Album of the Year at the 13th Mnet Asian Music Awards. The album, including the repackaged version, is listed as the 2nd best-selling album of the year for 2011. According to Gaon Chart, as of the end of December 2012, the album has sold a cumulative total of 543,623 copies domestically.