Britney Spears gushed over her niece, Maddie, 6, as the little girl watched Jamie Lynn Spears rehearse before the 2015 CMA Festival Credit: Courtesy Britney Spears/Instagram; Inset: Jesse Grant/WireImage

Maddie and mama! Britney Spears won't be in town for the 2015 CMA Music Festival this weekend, but she did receive some behind-the-scenes pics from her younger sister's rehearsals. The "Pretty Girls" singer posted an adorable Instagram snapshot of her niece, Maddie, watching Jamie Lynn Spears singing on Wednesday, June 10.

"How cute is Maddie watching mom rehearse?" Britney, 33, wrote. "Good luck at #CMAFest on Saturday @jamielynnspears! Wish I could be there!"

Jamie Lynn, 24, dressed down in black shorts and a matching top for the jam session. Maddie, nearly 7, wore pink headphones as she watched her famous mom rock out.

The former Nickelodeon star later slipped into a navy jumpsuit and pink heels for the CMT Music Awards. She's set to perform at the CMA Fest in Nashville on Saturday.

Jamie Lynn welcomed Maddie with her ex Casey Aldridge in 2008. She went on to marry boyfriend Jamie Watson in March 2014.

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