It looks like Britney Spears will have her fifth No. 1 album next week. Her new Circus CD is poised to debut in the top spot when figures are released, Billboard reports. Spears is expected to sell about 455,000 copies. Among female artists, only Barbra Streisand, Madonna, Mariah Carey, and Janet Jackson have had more No. 1 albums. Streisand leads the pack with eight.