On 'Extreme Makeover: Home Edition,' any glee from getting a new house was trumped by the chance to meet -- and dance with -- Justin Bieber.

When he taught Katrina, who was featured on show, some of his trademark moves, she wasn't shy at all.

"We do it differently where I come from," she said, and a dance battle ensued: Katrina and her friends against Bieber and his dancers.

See Justin's smooth moves after the jump!