Britney Spears Tweets Sia About Beautiful & Heartbreaking Song!

Britney Spears shows some love while pampering herself at a nail salon on Friday (August 23) in Calabasas, Calif.

“The song is both beautiful and heartbreaking @Sia. Evokes SO much emotion every time I hear it,” the 31-year-old entertainer tweeted earlier in the week to Sia about a song she is working on. “One of the most beautiful songs I have recorded in a LONG time :).”

PHOTOS: Check out the latest pics of Britney Spears

Earlier in the week, Britney posted a countdown for a yet undefined “All Eyes On Me.”

10+ pictures inside of Britney Spears heading out to a nail salon…