Final answer:
The claim is false; Motown was a Detroit-based record label famed for its influence in the 1960s and 1970s, not in Philadelphia or the 2000s-era rock music.
Step-by-step explanation:
The statement in the question is false. Motown is not a Philadelphia-based record label; it was actually founded in Detroit, Michigan. Furthermore, Motown is well-known for its significant impact on the music industry during the 1960s and 1970s rather than starting the careers of many 2000s-era rockstars. This record label played a crucial role in the racial integration of popular music as it brought African American artists to a broader audience and had a significant influence on the sound of the era, giving rise to famous acts like the Supremes, the Jackson 5, Stevie Wonder, and Marvin Gaye.