Off the release of This Is Acting, Sia has dropped a new lyric video for “Cheap Thrills,†which comes packaged with a new verse from Sean Paul. The video’s a trip back to the televised dance competitions of American Bandstand — interrupted, of course, by a pair of contestants in that classic Sia wig. Meanwhile, with the help of Sean Paul, the bouncy “Cheap Thrills,†which was originally written for Rihanna and later passed on by Icona Pop, settles into a different sort of reggae groove.