Vanessa Hudgens is looking back at one of her old relationships! It's not Austin Butler! We're talking all the waaay back to when she dated Zac Efron! During her former co-star Bart Johnson's Get Your Head In The Game podcast on Wednesday, the actress made a super rare comment about her former boyfriend - including how the sparks were flying between them during their audition process for High School Musical as teens! Vanessa recalled that she either sang Angels by Jessica Simpson or Reflection from Mulan when she first tried out for the Disney Channel movie.