Beyonce's father Mathew Knowles wed girlfriend Gena Avery in Houston, Texas, last weekend, but his famous offspring didn't attend the ceremony.

Knowles explained, "Unfortunately, Beyonce and Solange had previous engagements which made it impossible for them to attend."

Mathew & Gena had been engaged for 18 months. He ended his 31-year marriage to Beyonce's mother Tina in 2011.

We can't help but wonder if Beyonce and Solange aren't too happy about the break up of their parents' marriage or maybe they're not that fond of their new stepmom. Plus, Mathew is no longer Beyonce's manager, so there may be some bad blood between them.

Meanwhile, Queen B and her husband Jay-Z had a big party in Brooklyn, New York, on Wednesday to celebrate the release of the rapper's new album, "Magna Carta Holy Grail." The hip hop star surprised fans by announcing the release of his 12th studio album during the NBA finals in June.