Sources say Beyonce cheated on Jay Z with LeBron James!!

So apparently Jay Z wasn't the only one with a side piece during his relationship! Lebron's friend has apparently come out and said that Beyonce was allegedly Lebron's side piece.

This shocking claim is coming to life from LeBron's former friend, known as a Miami rapper who goes by the name of Lambo. Lambo was a friend of all of the James's family as he dated Lebron's mother Gloria.

Okay, so he was an insider and knows alllllll the secrets.

Lambo took to social media yesterday and suggested that Bey was Bron's "mistress". He's writing a TELL ALL BOOK exposing the alleged secrets about LeBron James.

This is what he said:

MY BOOK WILL BE GIVING THE WORLD THE TRUTH ABOUT WHY @beyonce WASN’T INVITED TO @kingjames WEDDING, AND ALSO WHY #savannajames Wasn’t invited to @beyoncewedding, THE MISTRESS WILL BE EXPOSED IN MY BOOK, MAYBE ITS A CUZING OF #jayz or @beyonce, U HAVE TO READ MY BOOK TO KNOW .

This is a crazy claim, BUT!!! remember when Bey and Jay Z were at the NBA finals and Jay seemed uncomfortable with how LeBron was watching Bey... 

This could get VERY AWKWARD!