J.Lo Was Britney's $15 Million X Factor?

JLo raked in $12 mil for her first season on "American Idol." There are reports she made $20 mil for the season that just ended, but we hear it's less than that.

Sources very familiar with the situation tell TMZ ... Britney's bottom line was no less than $13 mil. But sources connected with "X Factor" tell us Britney initially asked for a lot more -- $20 mil.

As we first reported, Britney and "X Factor" eventually settled on $15 mil for the season.