What makes Hey, Soul Sister by Train notable?

'Hey, Soul Sister' became Train's biggest hit, reaching No. 3 on the Billboard Hot 100 and earning multiple Grammy nominations. Its catchy chorus and ukulele-driven sound contributed to a wave of pop songs embracing acoustic instrumentation during the late 2000s. When 'Hey, Soul Sister' was released in August 2009, Train was experiencing a resurgence after a period of relative commercial decline following their 2003 album 'My Private Nation'. This single marked their return to mainstream success, helping to solidify their presence in the pop rock landscape.