. ♪ chaka khan >> this reminds me of that era when robin had a mullet. >> i own it, baby. >> chaka khan hi, i'm chaka khan and i want you to look out for me this season on "dancing with the stars." >> that's right. the '80s pop superstar heading to the ballroom for "dwts" i hope the judges feel for her on the dance floor. we know she'll be competing alongside bindi irwin, hayes greer, victor espinoza and the rest of the cast will be revealed right here on "gma." i know. i just want to -- but you know what, you thought that was good, listen to this. ♪ mamma mia >> a musical rendition. here i go again. if you're a fan of abba you may want to take a chance and bid on this. the grand piano they used to record hits like "dancing queen," "sos," "knowing me knowing you" is up for auction at szott by's but it will cost you some money, money, money, in the range of 1$1.2 million. the piano, though, does come with a certificate. it better, by the way of awe meantification from co-founder who says it's one of a kind. the auction is september 29th. that's when the winner takes it all. thanks very m