Sia performs her song 'Lentil' live at the Bat Bar in Austin, Texas. The track is from her fourth studio album 'Some People Have Real Problems', which she released in 2008 and became her first US Album Chart entry.
The pair will be seen teaming up with the rest of the Justice League in November.
Richie's daughter Sofia has been going out with reality star Disick for just over a month.
The filmmaker has some strong words to say about the original Groot introduced in 'Guardians of the Galaxy'.