updated 01/14/2013 AT 11:00 AM ET
•originally published 01/14/2013 AT 11:30 AM ET
She’s one of the world’s top pop stars, but even Beyoncé has her occasional moments of self-doubt.
“People see celebrities and they have money and fame, but I’m a human being. I cry, I get scared, I get nervous just like everyone else,” the singer, 31, admits in a newly released trailer for her upcoming HBO documentary, Life Is But a Dream, airing Feb. 16.
That’s just one of many confessions she has. Knowles, who welcomed her first daughter Blue Ivy with husband Jay-Z last January, also shares the sonogram and reveals how she found out she was pregnant.