Zac Efron looks back on his Wildcat days, admitting that he sings 'High School Musical' songs in the shower at his Hollywood Walk of Fame ceremony. The actor praises longtime friend Miles Teller, along with his co-star in 'The Iron Claw,' Jeremy Allen White, who were both on hand with tributes, as he receives his star on Hollywood Blvd. Zac also remembers the late Matthew Perry, reflecting on the time they spent together while filming '17 Again.'