When Lauryn Hill welcomed a bouncing baby boy on July 23, many fans wished the singer would expand her musical contributions in addition to her family.Lauryn Hill Gives Birth to Baby No.6, Fans ReactHill may not be hitting the studio, but she did hit the stage for the Rock the Bells festival on Saturday in San Bernadino, California. The "Everything is Everything" singer appeared earlier at the LA Rising Festival on July 29, fueling speculation that she would be among performers at the annual hip-hop festival.Hill joined hip-hop heavyweights such as Common, Nas and Erykah Badu, as well as crowd pleasing Wu-Tang Clan, Black Moon, Souls of Mischief and Mobb Deep, at the San Manual Amphitheatre. According to MTV, nearly 40,000 fans were in attendance.The former Fugees frontwoman closed out the show with hits from her 1998 classic, "The Miseducation of Lauryn Hill", including "Doo Wop (That Thing)," "Lost Ones," "Ex-Factor" and "To Zion." Hill brought out Nas to perform "If I Ruled the World (Imagine That)" off Nas' "It Was Written."