Now Playing: Demi Lovato's 'Let It Go' Music Video World Premiere

Now Playing: Billy Joel wears Star of David during concert

Now Playing: Lindsey Vonn slams 'despicable' leak of intimate photos hacked from phone

Now Playing: DeMario Jackson speaks out about the 'Bachelor in Paradise' scandal

Now Playing: New documentary explores Whitney Houston's sexuality, drug use

Now Playing: Behind the scenes look: Mitsubishi films Eclipse commercial during solar eclipse

Now Playing: Rachel Platten rocks out to 'Broken Glass' live on 'GMA'

Now Playing: Anna Kendrick credits Zendaya for her pajamas style

Now Playing: Taylor Swift fans speculate after the singer goes dark on social media

Now Playing: Rachel Platten talks about the inspiration for her new song, 'Broken Glass'

Now Playing: Bonnie Tyler to sing 'Total Eclipse of the Heart' during actual eclipse

Now Playing: Aly Raisman slams USA Gymnastics' handling of sex abuse scandal

Now Playing: Producer sued in connection with assistant's death

Now Playing: Legendary comedian Jerry Lewis dies at 91

Now Playing: Serena Williams' fiance shares about her unexpected 'pregnancy cravings' on Instagram

Now Playing: MLB stars descend on Little League World Series

Now Playing: Remembering activist and comedian Dick Gregory

Now Playing: Taylor Swift keeps fans guessing about possible new album

Now Playing: Sneak peek: the new 'Uncharted' video game

Now Playing: 'Real Live': The total solar eclipse