The 90210 cast hit the high seas Feb. 15 to film scenes for an upcoming episode, and photos reveal that these kids are swapping partners like square dancers! Not only was Naomi (AnnaLynne McCord) spotted cozying up to Preston (Nick Zano), but her ex-boyfriend Austin (Justin Deeley) was looking awfully chummy with Adrianna (Jessica Lowndes). Let’s try to make sense of these new pairings, shall we?

Naomi and Preston doesn’t seem like such an out-there match — the girl does love money, after all — but Austin and Adrianna? The last time I checked, Adrianna was in a relationship with Dixon (Tristan Wilds) and Austin was quickly becoming someone’s special friend in prison.

But hey, maybe it’s just a hug between old make-out buddies.

How do you feel about these potential pairs? Hit the comments section with your thoughts on “Austianna” and “Praomi.”

— Andy Swift

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Haylie Duff shows her newly engaged sister Hilary Duff some real sisterly love!

Hilary Duff‘s engagement to her longtime boyfriend Mike Comrie didn’t overshadow Haylie Duff on her 25th birthday! Haylie opened up to HollywoodLife.com EXCLUSIVELY about her sister’s Feb. 17 engagement … that just happened to coincide with Haylie’s big day.

Even though Hil missed her sister’s bash, Haylie gushes, “I think Hilary was so surprised! I’m so happy for them and know she is going to be a beautiful bride.” Now that is some sisterly love!

Of course Haylie had some celebrating to do of her own that weekend. She and her hot boyfriend Nick Zano, 31, celebrated the big 2-5  with a blow-out bash at Vegas nightclub Vanity on Saturday Feb. 20!

“Nick and Haylie seemed really lovey-dovey,” one eyewitness says of the couple. “They were kissing, holding hands, dancing and having a great time in general.”