Grammy-winning singer Rihanna's latest album, "Talk That Talk" has reached No. 1 on iTunes on Tuesday, one day after its release. The singer released early teasers online as much as a week in advance, helping push the album into the top 10 on iTunes. Fans took to Twitter and Facebook to call the album Rihanna's best yet. Critical reviews, however, were mixed. The 11-track "Talk That Talk" features themes of love and sexuality with a mixture of up-tempo dance tracks and reggae beats on "Where Have You Been," "Birthday Cake" and "You Da One," along with ballads "We All Want Love" and "Farewell." Talk That Talk" is the sixth studio album from the 23-year-old Barbadian singer, following CDs like "Rated R" and "Loud," which have seen her steadily evolve from teen pop star to adult performer since her 2005 debut.