Beyonce + 'American Idol' = head turning. The Queen B performed not once but twice on tonight's 'American Idol' season finale. Earlier on, she joined the ladies for a medley of her hits and barely an hour later, she returned to the stage to perform her brand new song, '1+1.' That's what we call launching a new song to the biggest possible audience.

Performing in a haze of red lights and wearing a platinum-silver gown and loose, beachy waves, Beyonce made love to the crowd as she belted out this lovestruck ballad. You'd have thought her hubby Jay-Z was in the front row -- since she looked so adoringly at the crowd and sang the ultra romantic lyrics directly to it.

Bey also announced that this was her new favorite song before she began singing, and we're not going to argue with her; it's a signature Beyonce ballad and it's softer and prettier than her current single, 'Run the World (Girls.)' Her only sonic accessory was the piano melody, so the song is all about Beyonce and her room-filler of a voice.

'1+1' appears on Beyonce's forthcoming album, '4.'

Watch Beyonce Perform '1+1' on 'American Idol'