Netflix has been big on adding musical documentaries and concert performances lately. A few more were added to Instant Watch recently, including docs that feature Lady Gaga and Justin Bieber.

I can not vouch for either of these docs, but primers on each, with links, are below:

Lady Gaga: One Sequin at a Time

This documentary-style portrait of pop idol Lady Gaga — better known to her friends and family as Stefani Joanne Angelina Germanotta — leaves no sequin unturned in its search for the truth about her origins, her music and her artistic influence.

Justin Bieber: The Untold Story of His Rise to Fame

With millions of fans screaming his name, baby-faced Justin Bieber is a teen heartthrob and one of the hottest acts in the music world. Performance clips and interviews trace Bieber’s rise from a YouTube phenom to a chart-topping sensation.