In reply to Lax.

Rih,
Having first reigned atop the Hot 100 the week of May 13, 2006, with "SOS," Rihanna logs the shortest span between a solo artist's first and 10th No. 1s in the chart's 52-year history, a stretch of four years, 11 months and two weeks. (This week's charts are dated Apr. 30, 2011).

Rihanna bests the five-year, four-month span between current Island Def Jam labelmate Mariah Carey's first ("Vision of Love," Aug. 4, 1990) and 10th ("One Sweet Day," Dec. 2, 1995) toppers to complete the quickest sprint to 10 Hot 100 No. 1s among solo artists. (Carey collected the first 15 of her 18 career No. 1s while signed to Columbia Records).