When four furry voices get together, musical magic is made. International rock and pop stars Alvin, Simon and Theodore may be small, but they make big hits. The squeaky harmonies of Alvin & The Chipmunks are impossible to resist for both children and adults, with high energy covers of songs by Lady Gaga, LMFAO and Sister Sledge, as well as their own material. Their female counterparts, The Chipettes, bring glamour, sparkling vocals and swishing tails to the party. Never has a musical style been so distinctive.