Janet Jackson promises to show “a side that no one’s ever seen” in a new extended trailer for “Janet Jackson,” a two-night documentary event from Lifetime and A&E. The spot kicks off with familiar faces reflecting on Jackson’s legacy: Regina King describes her as “a blueprint,” and Samuel L. Jackson identifies her as “the greatest showwoman.” But the “All For You” singer wasn’t always sure she was destined for stardom. “There were times when I just didn’t understand where I fit in,” she says of growing up with her brothers, The Jackson 5.

“There’s a great deal of scrutiny that comes with having that last name,” Jackson says in the trailer.

“Janet Jackson” premieres Friday, January 28 at 8/7c. The film celebrates the 40th anniversary of Jackson’s first album, 1982’s “Janet Jackson.”