• Taylor Swift, Haim sisters

Taylor Swift, Haim sisters (Photo : Instagram)

"Blank Space" hitmaker Taylor Swift, 25, surprised her fans on Jan. 24 when she posted an Instagram photo of her bikini-clad exposing her belly button, which is rarely shown to the public.

"Greetings from Maui! @haimtheband" Swift captioned the photo showing off her bikini body while she was on vacation in Hawaii with the band Haim, which consists of the Haim sisters Este, Danielle and Alana. They also have a band mate, their drummer Dash Hutton, who apparently did not join them in their Hawaii escapade.  

Like Us on Facebook

While in Hawaii, the Haim sisters and Swift enjoyed hiking and boating.

Although she is known for not wanting to show too much skin, Swift also posted another Instagram photo of her showing off her legs with a caption, "She's always wearing, like, a 1950's bathing suit."

In another photo, the Haim sisters and Swift show their admiration for Bill Murray, 64, while sporting sweatshirts that bore the actor's name.

Murray is currently filming "The Jungle Book" and "B.O.O.: Bureau Of Otherworldly Operations" voicing characters for both movies. He is also set to appear in the upcoming Barry Levinson film "Rock The Kasbah" with Kate Hudson, taylor Kinney and pregnant "New Girl" star Zooey Deschanel.

Since playing the Jingle Ball together over the holidays, Swift and the Los Angeles pop rock band have become fast friends, Daily Mail has learned.

Swift's song "Blank Space" recently dropped to number three at the Billboard Hot 100 with Mark Ronson's "Uptwon Funk" featuring Bruno Mars at number one and Ed Sheeran's "Thinking Out Loud" at number two.