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American animated virtual band and media franchise featuring three singing chipmunks: Alvin, Simon, and Theodore.Created by Ross Bagdasarian Sr. (as David Seville) in 1958, the group gained fame for novelty records using sped-up vocals. Managed by fictional human guardian Dave Seville, they became pop culture icons through music, TV series, and films, winning multiple Grammy Awards.

• Creator Ross Bagdasarian developed the signature high-pitched voices by recording at half-speed and playing back at normal speed, a technique later patented as the 'Chipmunk Effect'.
• After Bagdasarian's death in 1972, the franchise was revived in 1980 by his son Ross Bagdasarian Jr. and daughter-in-law Janice Karman, who modernized the characters and produced new content.
• The 2007 live-action/CGI hybrid film 'Alvin and the Chipmunks' sparked controversy among fans for deviating from the original animation style, though it became a box office success.
• Their 1958 debut single "The Chipmunk Song (Christmas Don't Be Late)" remains the best-selling Christmas song in history by a group, spending four weeks at No. 1 on Billboard's Hot 100.