Britney Spears and sister Jamie Lynn duet on ‘Britney Jean’

It’s official! Britney Spears’ lil sis Jamie Lynn Spears will appear on the pop star’s last album Britney Jean. The sisters will duet on a song called “Chillin’ With You.”

“Sneaky hackers always trying to ruin my surprises. Here is the TRUE #BritneyJeanTrackList,” Britney tweeted last night. “So SOOO beyond excited to have my baby sis @jamielynnspears on the album. @Tip!!! My homie :).”

Here’s the track list in full:

“Alien”
“Work Bitch ”
“Perfume”
“It Should Be Easy (feat. Will.i.am)”
“Tik Tik Boom (feat. T.I.)”
“Body Ache”
“Til It’s Gone”
“Passenger”
“Chillin’ With You (feat. Jamie Lynn Spears)”
“Don’t Cry”
(Deluxe Edition Tracks)
“Brightest Morning Star”
“Hold On Tight”
“Now That I Found You”
“Perfume (The Dreaming Mix)”

Jamie Lynn recently shared this adorable photo of herself with daughter Maddie, who’s looking more and more like auntie Britney.