Beyonce's Sister Solange Knowles on 'Formation': 'Slay Sis!'

Beyonce is slaying this Saturday with the release of her surprise new single “Formation” and her younger sister Solange Knowles agrees with that statement!

“Y’all gonna learn bout dem children of Celestine & Mathew, lol. Slay sis, slay✊,” the 29-year-old singer tweeted just hours after the song dropped.

“And Slay niece, slay �’�,” Solange added, referring to the cameo that her niece Blue Ivy Carter has in the video.

Hopefully the release of the song will help cheer up Solange after she lost her wedding ring during a parade in New Orleans this week.