Videos Nicole Azzopardi - Knock Knock!....Boom! Boom! Visit http://www.junioreurovision.tv. Nicole Azzopardi sings Knock Knock!....Boom! Boom! for Malta at the 2010 Junior Eurovision Song Contest. Malta2010MinskJuniorNicoleEurovisionSongcontestKnockBoomAzzopardiKnock!....Boom!