In December 2012, Redfoo released his first solo single "Bring Out the Bottles" and appeared in the film Last Vegas. On April 21, 2013, Redfoo was confirmed as Guy Sebastian's replacement for the fifth season of the Australian version of The X Factor, a singing talent television show, joining Ronan Keating, Natalie Bassingthwaighte and fellow debuting judge Dannii Minogue, who replaced Mel B. Because of commitments to The X Factor, he relocated to Sydney, Australia in 2013. In September, Redfoo released a new hit single titled "Let's Get Ridiculous", which he premiered on The X Factor Australia, performing live during the third live show. The single debuted at number one on the ARIA Singles Chart and was certified four times platinum by the Australian Recording Industry Association. On October 19, 2013, Redfoo released the pilot episode of his new comedy web series, Behind the Speedo. A second episode was released on March 25, 2014. In 2014, Redfoo returned for the sixth season of The X Factor Australia. In June 2014, he released a new single titled "Where The Baes At" with Eric D-lux and Rio. In August 2014, Redfoo released a new single titled "New Thang" and peaked at number three in Australia.
Redfoo began dating former number one ranked tennis player Victoria Azarenka in 2012, but the couple split in 2014. He attended the 2012 US Open, 2013 Australian Open, 2013 Wimbledon Championships and 2014 Australian Open as a member of Azarenka's player box. As a tennis player, he attempted to qualify for the 2013 US Open as a wild-card entry. He entered the USTA Northern California Sectional qualifying tournament in June and was knocked out 6–1, 6–2 in his first match.