Solange Knowles and her sister Beyonce were seen cutting loose in New York City Tuesday night at the afterparty for a screening of a new documentary on Mrs. Carter airing this Saturday at 9 p.m. on HBO.

As Solange Knowles works the turntables at the afterparty for the documentary that is said to tell Beyonce's backstory, a YouTube video shows Beyonce working the dancefloor. The two sisters seem to be having a blast.

The video was posted on the YouTube page of Rubin Singer- the designer who designed Beyonce's leather and lace body suit for the Super Bowl.

Oprah Winfrey, who will air a pre-taped interview she did with Beyonce on her OWN Network at 8 p.m., an hour before "Life Is But A Dream" premieres on HBO, raved that the doc is a "game changer."

"She did an amazing job," Oprah said, according to the website Enstarz. "People are going to be amazed. People are going to feel a connection to her that they didn't feel before. Because she shows us how real she is. She understands that all pain is the same. The way she hurts is the same way other people have hurt."

Tickets for the Mrs. Carter World Tour Beyonce announced on the heels of her Super Bowl performance have been selling out in seconds, according to entertainment blogger Perez Hilton, and the Huffington Post predicts Beyonce will be the highest grossing touring act of the year.

But don't think Beyonce is the only Knowles that is making moves.

Solange Knowles isn't just DJing her sisters afterparties. In November, the 26-year-old stunner released an EP called "True" featuring collaborations with the artist Dev Hynes who also goes by the name Blood Orange.

"These are just really, really strong amazing pop songs, but they still are interesting and they still encompass a lot of layers and nuances that have those intricacies," Knowles told theGrio. "I have learned that I'm generally attracted to albums and records, from as early as I can remember, that are produced by one producer; that are written by the artist; that is a true collaboration, which sort of transcends a moment in time; that is a real vibe, a real energy."

Knowles recently announced to ESSENCE Magazine that she will perform at the ESSENCE Musical Festival in July.

SEE THE VIDEO OF SOLANGE AND BEYONCE GETTING DOWN HERE