Taylor Swift took a vacation to Hawaii with her singing friends, according to her Instagram posts Friday. She posted a bikini photo with Haim sisters Este, Danielle and Alana with the caption, "Greetings from Maui!"

She also posted another photo of her and friends stating, "When we were whale watching and didn't see whales for 5 minutes and got all moody."

The 25-year-old pop star put rumors of her missing belly button to rest, Billboard reported.

"When you start showing your belly button then you're really committing to the midriff thing. I only partially commit to the midriff thing -- you're only seeing lower rib cage," Swift said. "I don't want people to know if I have one or not ... I want that to be a mystery."

In other news, Taylor Swift's album "1989" is No. 2 on Billboard's top 200 album chart, according to The Hollywood Reporter.

She sold four million copies in the week ending Jan. 18 and sales rose to 4,036,000.

Each of her five full-length studio albums have sold at least four million copies with her biggest seller being "Fearless" released 2008 at a total of 6.9 million sales.

Swift's next biggest gains were from her self-titled album with 5.5 million, 2010's "Speak Now" with 4.5 million and "Red" with 4.1 million.

She's also known to throw a good party according to Nick Jonas who was at the star's 25th birthday bash. He told Rolling Stone that Taylor threw a really good party and he was really pumped about hanging out with Jay Z and Beyoncé.

Meanwhile, according to 100 UK, a group of Taylor Swift fans are holding a guerilla internet campaign to have her "Shake it Off" single placed at number one on Australia's hottest radio station, Triple J., via the #Tay4Hottest100 hashtag.

In retaliation, the station disqualified the song form its poll that allows people to vote on their favorite song of the year.

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