Olivia Palermo: Bikini Babe in St. Barts!

Olivia Palermo rocks a red bikini while hitting the beach on Thursday (January 5) in St. Barts.

The 25-year-old City alum splashed around in the waves and tossed a volleyball with her shirtless model beau Johannes Huebl.

Olivia‘s official website recently shared one of her current obsessions – studs – and how to shop for them.

Some of her picks: a $795 Christian Louboutin studded iPad case, $1,650 Bottega Veneta knot clutch, and $895 Ruthie Davis sharp ballerina flats!

10+ pictures inside of Olivia Palermo and Johannes Huebl at the beach in St. Barts…