CMA Awards 2018

Ashley Tisdale & Lucas Grabeel Reunite to Sing 'What I've Been Looking For'

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Music Sessions with Ashley Tisdale ft. Lucas Grabeel, "What I’ve Been Looking For"

Two days after Ashley Tisdale and Vanessa Hudgens had a mini High School Musical reunion at the Billboard Music Awards, the 31-year-old decided to keep the HSM feels alive by hanging out with her on-screen twin Lucas Grabeel. And to really make the HSM fans go crazy, the two teamed up for a new rendition of their song "What I've Been Looking For."

Before Tisdale and Grabeel began their piano-based version of the tune, they reminisced on their days of being castmates -- which apparently weren't initially as fun as it may have seemed for the pair.

"We hated each other, not kidding," Tisdale laughs. Grabeel further suggested that Tisdale really wasn't joking: "We didn't get off on the best foot."

But as insinuated by their interactions during their reunion, their relationship grew over time the way that a real-life brother and sister relationship does. "I think we just didn't know each other. I was definitely a lot like Sharpay, and Lucas was like 'Who is this person?'" Tisdale explained. "I have to say, after we wrapped, though, I've always had a love for you. You're literally like my twin brother."

Watch Grabeel and Tisdale's performance of "What I've Been Looking For" -- their first time in 10 years -- below.