LOS ANGELES, April 1 (UPI) -- Britney Spears gave fans a glimpse into her Hawaiian vacation this week on Instagram.
The 34-year-old singer is enjoying a tropical getaway with 24-year-old sister Jamie Lynn Spears, sons Preston and Jayden and niece Maddie, Jamie Lynn's daughter.
The sisters treated themselves to a spa day Wednesday and shared a photo of themselves in their matching robes. The star sweetly captioned the picture, "Best spa day with the best little sister."
Preston and Jayden's dad is Britney Spears' ex-husband Kevin Federline, to whom she was married from 2004 to 2007. Federline is also dad to two children by wife Victoria and two by ex-girlfriend Shar Jackson.
"I'm the happiest I've ever been," Britney Spears told People in March 2015. "My kids come first in my life, bottom line."
"Preston is very opinionated, very expressive, and if he doesn't like something, he's going to tell you," she said. "But he has a huge heart, he's a good kid and he has manners. Jayden is sweet, very soft-spoken, kinda funny. He's adorable -- a momma's boy."
Spears last released Britney Jean in 2013 and is in residence at The Axis at Planet Hollywood in Las Vegas through 2017. She and brother Bryan Spears recently surprised Jamie Lynn by introducing her at her performance at the Grand Ole Opry.