Spears and Aguilera were involved in an almost 10 year feud, only ended this past year with Christina’s marriage to Jordan Bratman and Britney’s birth to son Sean Preston. Additionally, Spears and Timberlake dated for almost three years. A source says that Spears’ choice infuriates hubby Kevin Federline, as he thinks “Britney is just doing it so she has an excuse to see Justin.�?

Speaking of Federline, the apiring rapper, r told Ellen DeGeneres on her talk show Wednesday that wife Britney Spears's cravings are "not too bad" compared to a year ago, before the birth of son Sean Preston.

"Ice chips all the time," he said about Spears's favorite snack – admitting that he had to ask his mother what that was all about, and she couldn't adequately explain it to him, either.

What he does understand, however, is that at age 28 he likes being a young father.

"My father was young with me," says Federline, who, besides Sean Preston, is also dad to daughter, Kori, 4, and son Kaleb, 2 (their mother is actress Shar Jackson). "He was, like, 22. I had a good relationship with my father. He was able to keep up with me."