Mauboy performed " What Happened to Us " live for the first time during her YouTube Live Sessions program on 4 December 2010 . She also appeared on '' Adam Hills in Gordon Street Tonight '' on 23 February 2011 for an interview and later performed the song . On 15 March 2011 , Mauboy performed " What Happened to Us " on '' Sunrise '' . She also performed the song with Stan Walker during the Australian leg of Chris Brown 's F.A.M.E. Tour in April 2011 . Mauboy and Walker later performed " What Happened to Us " on '' Dancing with the Stars Australia '' on 29 May 2011 . From November 2013 to February 2014 , " What Happened to Us " was part of the set list of the To the End of the Earth Tour , Mauboy 's second headlining tour of Australia , with Nathaniel Willemse singing Sean 's part
F.A.M.E. Tour
F.A.M.E. Tour (Chris Brown)
What Happened to Us