Tonight the Top 7 will perform live for the nation, vying for the American Idol title. The contestants will give it their all in hopes of winning Americas vote and surviving another week. Who will play it safe and who will take the big risk? Their fate rests in your hands.Tonights theme is the 1970s. Performing tonight are Tamyra Gray, Ryan Starr, Justin Guarini, Kelly Clarkson, Christina Christian, Nikki McKibbin, and R.J. Helton.