19. Robin Sparkles, 'How I Met Your Mother'
When the How I Met Your Mother gang learned that Robin had a secret, they all thought it had something to do with Barney. But the real secret was oh-so-much better: when Robin was a teenager she was a Canadian pop sensation known as Robin Sparkles, who had a '90s hit single called "Let's Go to the Mall." Sample lyric: "I'm gonna rock your body til Canada Day."