The normally happy couple that is Katy Perry and Russell Brand could be headed for splitsville. Katy was snapped splashing in the waters of Hawaii sans ring and Russell over the Christmas holiday. Now US Weekly tells us why:
“They had a massive fight,” an insider tells Us Weekly. “She was like, ‘F–k you. I’m going to do my own thing.’ Russell replied, ‘Fine, f–k you too.’”

Which explains why, come Dec. 25, the multi-platinum singer was snapped splashing in the Pacific Ocean off Kauai — sans wedding ring. Meanwhile, British comic Brand, 36, was catching up with a pal in a pub in chilly Coverack, Cornwall.

Though the pair denied divorce rumors in November, sources say trouble is brewing. “They haven’t split up just yet, but things are not good,” says the first source. “The fighting is getting worse.”