Battle of girls who used to be good friends (hence the "Marmalade" pact) and just a few years ago have slashed out feuds against each other. Now Christina has a comeback single and P!nk has a single that's currently top 5 in the UK also helping her album "I'm Not Dead" go top 5 in the UK again rising to #5 this week.
"Who Knew" completely trumps "Ain't No Other Man": it's so beautiful.