Whitney Houston is still rules the Billboard magazine pop charts. Her album, "Whitney," which debuted last week at the top of the pop chart, is still No. 1. "I Wanna Dance With Somebody," the first single from the album, also heads the singles chart. L.L. Cool J's red-hot "Bigger and Deffer" moved up two notches to No. 11. Two artists not known as chart-toppers both have cracked the Top 40 with recent releases. Suzanne Vega's "Solitude Standing" is No. 31 and the Cure's "Kiss Me, Kiss Me, Kiss Me" is No. 35. Gloria Estefan and Miami Sound Machine's "Let It Loose" seems headed for the Top 10. It's climbed to No. 37 in three weeks. The System made its Top 10 singles chart debut with "Don't Disturb This Groove" (No. 7). "Point of No Return" (No. 9) is Expose's second consecutive Top 10 single.