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Beyonce Knowles, Tina Knowles

Nancy Kaszerman/ZUMA Press.com

We guess Beyoncé's parents aren't so crazy in love anymore.

The Grammy-winning diva's mom and partner in design, Tina Knowles, petitioned to divorce her dad and manager, Matthew Knowles, in a Houston court, ending their 29-year marriage.

Per court documents filed Nov. 11 and obtained by Media Take Out, Beyoncé's mom did not cite any official reason for terminating the union.

Of course, that paternity suit against Matthew by another woman filed in October might have been a hint things were awry.

No comment yet from Tina, Matthew, Beyoncé or younger sis Solange, but we're guessing this won't be the happiest of holidays at the Knowles household.

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It's tough being in the spotlight. See who makes it work in our Famous Families photo gallery.