The MTV-bred girl group Danity Kane, above, scored its second No. 1 on the Billboard album chart this week. Its new release, “Welcome to the Dollhouse” (Bad Boy/Atlantic), moved 236,000 copies in the United States, Nielsen SoundScan reported. The only other debut in the Top 10 had surprisingly low sales: Flo Rida, the Miami rapper whose song “Low” is the biggest-selling digital track ever, sold only 86,000 copies of his album “Mail on Sunday” (Atlantic) to reach No. 4. The pop compilation “Now That’s What I Call Music!” Vol. 27 is No. 2 with 170,000; Rick Ross’s “Trilla” (Slip-N-Slide/Def Jam), last week’s No. 1, fell two spots with 90,000 sales; and Jack Johnson’s “Sleep Through the Static” (Brushfire/Universal) is No. 5 with 67,000. Also this week, Miley Cyrus became the first female artist since LeAnn Rimes 11 years ago to have two albums in the Billboard Top 10, with “Hannah Montana 2 /Meet Miley Cyrus” (at No. 6) and “Hannah Montana/Miley Cyrus: The Best of Both Worlds Concert” (No. 10), both released by Disney.