Best start on the US Album chart by a female artist

When her 2003 album In The Zone debuted at No.1 on The Billboard 200, Britney Spears (USA) became the first female artist in US chart history to see her first four albums reach the top. All four titles were million-sellers and each debuted at No.1. Albums were (note the use of ellipsis in first two titles): ... Baby One More Time (1999), Oops! ... I Did It Again (2000), Britney (2001) and In The Zone (2003). Alicia Keys matched Britney Spears' record when her first four albums - Songs In A Minor (2001), The Diary Of Alicia Keys (2003), Unplugged (2005) and As I Am (2007) - all reached No.1.