United Kingdom, Oct. 16 -- Kevin Federline wants "nothing but greatness" for Britney Spears.

The 47-year-old dancer has faced criticism from his ex-wife over his upcoming memoir You Thought You Knew - in which he claimed she called Justin Timberlake the night before they got married, stood watching over their sleeping sons with a knife in her hand, cheated on him with a female dancer and snorted cocaine while still breastfeeding - and though they are not in direct contact, Kevin insisted he only wishes Britney well.

He told Us Weekly magazine: "All I really want is for her to be able to have a wonderful relationship with her children.

"I want her to be happy, healthy and all of the things. I want nothing but greatness for her."

Kevin ...