is paying tribute to some of music's biggest names! This week, is celebrating Icons Night, and ET will be following along the whole time.The remaining seven celebs and their pro partners will be hitting the dance floor to honor some of the most iconic artists, with routines paying homage to performers like Britney Spears, Janet Jackson, Madonna, Freddie Mercury and more!ET is following along for the entire two-hour spectacular, and breaking down all the biggest dance numbers, best scores and