"When Rihanna tweets, people listen.On Sept. 15, the diva tweeted a response to one of her followers asking ""When's the next album due?"" with ""THIS FALL!!!!!"" which must have been music to the ears of her fans.Sources confirm that a new album is indeed coming soon -- and it will likely be a proper full-length studio effort.If so, it will mark Rihanna's sixth studio album since her ""Music of the Sun"" arrival in 2005 and will come nearly a year after her last set, ""Loud,"" was released in November of 2010. This sort rapid-fire release pattern isn't new for the star: since 2005, she's dropped a new album every year except for 2008.""Loud"" debuted and peaked at No. 3 on the Billboard 200 chart and has sold 1.5 million copies in the U.S. according to Nielsen SoundScan. It has spawned six Billboard Hot 100 hit singles, and of those, three were No. 1s: ""Only Girl (In the World),"" ""What's My Name?"" (featuring Drake) and ""S&M"" (featuring Britney Spears). ""Loud"" is her second-biggest selling album next to only 2007's ""Good Girl Gone Bad"" (2.7 million).""Loud's"" most recent hit, ""Cheers (Drink to That),"" became the album's fourth top 10 this week, as it climbed 11-10 in its seventh week on the tally. Kelly Clarkson's 'Know It All' Debuts on Hot 100, Rihanna's 'Cheers' RisesCollectively, all of Rihanna's albums -- including her two remix efforts -- have sold 7.3 million in the U.S. While she's had five top 10 albums and a stunning 10 Hot 100 No. 1 singles (a total few acts in history can boast), a No. 1 album on the Billboard 200 chart still eludes her. The closest she came was with ""Good Girl Gone Bad,"" which debuted and peaked at No. 2. Rihanna's 'S&M' Reigns on Hot 100, Lady Gaga's 'Judas' DebutsCan Rihanna's next album snare the diva her first No. 1? Stay tuned..."