R&B singer Solange Knowles has scrapped plans to perform at this year's South By Southwest (SXSW) Festival in Texas due to her son's busy school schedule.

Beyonce's younger sister, 23, has canceled her showcase gigs at the last minute after struggling to fit her duties as a mother to five-year-old Daniel Julez around her work commitments.

Apologizing to fans on her Twitter.com page, she writes, "Sorry to ALL that are asking me about my SXSW gigs being cancelled. I'm a mommy first, and Julez has school biz (business) I COULDN'T get out of!! There's always next year...????"
The annual music industry festival kicked off on Wednesday night with performances from Spoon, Broken Bells, Sharon Jones & the Dap-Kings.

The event runs until Sunday.