I tip my wig and my hat to Madonna ... Underwood let out a few growls a la the late music legend. But perhaps Sharon Osbourne had it the easiest of the bunch as Sia in a performance of the ...

Osbourne, 61, had one of the most elaborate ensembles: a sexy Captain Hook costume with a fitted black jacket, red satin corset, black wig, feathered black hat, fake mustache, and, of course ...