The proud father said his adorable 18-month-old girl is "biggest fan" in a heart-warming interview.
"She loves all the songs," he said. "She plays a song and she goes, 'More, Daddy, more ... Daddy song.' She's my biggest fan."
He added, "If no one bought the Magna Carta [album], the fact that she loves it so much, it gives me the greatest joy."
With two global music superstars for parents, it's unsurprising that little Blue Ivy gets into the groove when their music comes on.
It's not just Jay Z's music that Blue Ivy bops along to - she is also a fan of her mother Beyoncé's beats.
"She does like her mother's music – she watches [Beyoncé's concerts] on the computer every night," he explained to Vanity Fair. "But my album came out and I don't know if Blue ever heard any of my music prior to this album. ... But this album was new, so we played it."
Jay Z, real name Shawn Carter, says he loves that his daughter is a genuine fan who doesn't bluff her enthusiasm.
"She's genuine, she's honest, because she doesn’t know it makes me happy," he says. "She just wants to hear it."
Blue Ivy will soon be back on the road with her megastar mum whose Mrs Carter world tour Australia and New Zealand legs kick off in two weeks.
Blue Ivy's passport already boasts an impressive collection of stamps. Joining her mother on tour, she has jetted across the globe to locations including London, Paris, Milan, Berlin, Zurich and Stockholm.