The American Idol theme for March 31, 2009 will be “Top Downloads“, and by that we assume Top 100 iTunes downloads, according to news spreading around the net, ever since Idol host Ryan Seacrest announced the Top 9 Idol contestants will be singing songs from “top downloads”.

Past American Idol Season 7 champ, David Cook, will return to the Idol stage performing on this week’s Top Downloads results show airing on Wednesday, April 1, 2009. David Cook will perform Come Back To Me, the latest single off of his self-titled debut album.

This is David Cook’s first return visit to the American Idol stage since being crowned winner of American Idol Season 7, in the midst of Cook’s headline tour that started February 13th and venue locations have been sold out, with David Cook fans anxious to see their past Idol favorite.

Also performing on the same night of American Idol’s Top Downloads is Lady GaGa, singing her hit single Poker Face. Lady Gaga’s debut album entitled “The Fame” was released in 2008, and the hit single “Just Dance” received Grammy attention for Best Dance Recording.

Be sure to check back for our LIVE recap of our American Idol Top 9 finalists, with our review of each “top downloads” performance as it happens, along with Idol judges comments and opinions. We’ll include which American Idol contestant we think will be in the bottom 3 for Wednesday’s elimination vote of who gets voted off American Idol this week. We’ll also include a reader POLL where YOU can vote for who YOU think did the best Top Downloads performance on American Idol Season 8 this week.

We think it’ll be quite interesting to watch David Cook and Adam Lambert appearing on the very same stage, don’t you?! Who do you think is Best? David Cook or Adam Lambert?