Ashley Tisdale & Lucas Grabeel Reunite to Sing 'High School Musical' Duet

High School Musical lives! 

Ashley Tisdeale reunited with her on-screen twin brother Lucas Grabeel for a super nostalgic performance of "What I've Been Looking For," originally performed by their characters Sharpay and Ryan Evans in 2006's High School Musical. The piano-led, harmony-heavy rendition is a bit different than the uptempo fans may remember from the sensational Disney Channel movie, but you'll still find yourself humming along to that familiar melody.