chris brown. we have a whole list here. phil spector, rick james, ike turnernot like their music is taken off >> it's a complex issue. i think one of the issues here for spotify in particular is that by including someone like r. kelly in a play list n, in a way, spotify is endorsing their music. we think you'd like to listen to this and i think that spotify, my sbern interpretation of their new hate speech policy is they don't want to be seen as endorsing an artist who they disagree with their actions. >> it's a slippery slope, though, julia, right >> complicated issue >>> i mean, based on some lyrics, you could ban a lot of songs. >> oh, for sure. >> right i mean, it could go on and on. >>> coming up, robert frank has taken us behind the scenes of the stunning rockefeller auction. well, today he's back at christie's with a very special guest. robert >> hey, michelle we are already up to $762 million with a whole other day to go here at the rockefeller sale at christie's we have a very special guest, ariana rockefeller, the equestrian athlete, the designer, an