<P> Liv and Maddie airs on Disney Channel in the United States and Family Channel in Canada . The pilot episode aired as a preview on July 19, 2013 . The first promo for the series was seen on June 28, 2013 . The series officially premiered in the United States on September 15, 2013, and in Canada on September 20, 2013 . The series stopped airing in Canada on Family Channel on September 1, 2015, and started airing on Disney Channel on September 5, 2015 . La Chaîne Disney in French Canada premiered the episode "Home Run - a-Rooney" on March 24, 2016, 17 days before the US and Canada airing on April 10, 2016 . In the UK and Ireland, the series aired a preview on October 7, 2013, and later premiered on November 8, 2013 . In Australia and New Zealand, the series premiered on October 11, 2013 . The second season premiered on January 8, 2015 . The third season premiered on December 2, 2015 . The series premiered in Southeast Asia on January 10, 2014 . In the Balkans, Greece, the Middle East and Africa, the series premiered on March 8, 2014 . The second season premiered on February 7, 2015 . </P> <P> Emily Ashby of Common Sense Media gave the series' quality a rating of three out of five stars, describing it as a "jovial family sitcom" and applicable for ages seven and above . Ashby credited the series' "comical spin" on common family issues, like sibling rivalry, stating: "As is true of most tween - targeted comedies, the series glosses over a lot, especially when it comes to teen issues, but that's what makes it a worry - free pick for kids ." Neil Genzlinger of The New York Times compared the series to The Patty Duke Show while describing it as "a gentle, moderately amusing comedy" and praising Dove Cameron's portrayal of the down - to - earth Maddie and diva Liv, stating: "...the premise gives the writers plenty of opportunities ." </P> <P> A full version of the Liv and Maddie theme song, "Better in Stereo", was recorded by Dove Cameron and released as a promotional single by Walt Disney Records on October 15, 2013 . A music video was filmed and aired on Disney Channel the night of October 29, 2013 . The song was featured multiple times throughout the show, first in the season three finale, "Californi - a-Rooney", and then an acoustic version sung by Dove Cameron during the season four and series finale, "End - a-Rooney". </P> <P> In the pilot, "Twin - a-Rooney", Liv shows Maddie a clip from the Sing It Loud! finale in which Liv's character, Stephanie Einstein, sings a cover of On Top of the World by Imagine Dragons . A full version of the song was recorded by Cameron and was released as a promotional single by Walt Disney Records on August 27, 2013 . </P>

Who sings the theme song to liv and maddie