Dancing with the Stars by Kelsey McNeal/ABC, American Idol by Frank Micelotta/Fox Dancing with the Stars by Kelsey McNeal/ABC, American Idol by Frank Micelotta/Fox

Ali vs. Frazier. David vs. Goliath. Isaiah vs. Dempsey. Tuesday night gave television its first-ever faceoff between American Idol and Dancing with the Stars. The result? Idol walked away with an easy win in the 9 o'clock hour of head-to-head action, delivering 26.8 million total viewers to DWTS' 15.17 mil. (For the night, AI did an even 27 - down 2.4 mil from last week as well as year-over-year - while Dancing averaged 16.8 mil over its 90-minute run.)

Elsewhere:

" Biggest Loser (7.85 mil) was up a hair, while Big Brother (5.48 mil) was down 480K.
" One Tree Hill (2.92 mil) gained 470 thou.
" Jericho slipped just a bit, to 5.78 mil.
" Miss/Guided debuted to 10 mil.