No Doubt Joins Fireaid Lineup, Rare Reunion For Pop Group

L.A. Fireaid is bringing out some of the big artists and providing a reason for some huge groups to link back up ... even Gwen Stefani and her old bandmates are getting back together once again! Sources with direct knowledge tell TMZ ... No Doubt has just joined the already star-studded lineup for L.A. Fireaid on January 30. As you know ... No Doubt dominated the pop charts throughout the 1990s and into the early…