Jess Meuse and Dexter Roberts perform a duet Wednesday night on American Idol.
Jess Meuse and Dexter Roberts perform a duet Wednesday night on American Idol. (FOX Photo)

On a night when American Idol took its Top 8 back to the 1980s, Caleb Johnson and Alex Preston came out on top.

Caleb delivered the ballad judge Harry Connick Jr. has been begging for and the crowd loved his version of "Faithfully."

Alex changed up the popular hit "Every Breath You Take" in one of the night's bigger risks -- one at least two of the Idol judges said paid off.

And the Idols got a helping hand this week in the form of some excellent advice from Season 7 champ David Cook.

For song by song grades from the show, head here.. For a recap with predictions on what will happen Thursday, head here.