blackeyedpeas Hip-hop group whose songs "Boom Boom Pow" and "I Gotta Feeling" were simultaneously #1 and #2 in 2009: 3 wds Fergie's group Fergie, Taboo, will.i.am, and apl.de.ap: 3 wds "With ___ on the side ..." "My Humps" band (with "the"), 2005: 3 wds "Let's Get It Started" group Traditional 12/31 Southern side dish They performed "I Gotta Feeling" during the 2011 Super Bowl halftime show: 3 wds Their "I Gotta Feeling" knocked their own "Boom Boom Pow" off the #1 spot on Billboard: 3 wds Southern staple, and a hint to this puzzle's theme