There is a CD (released in 2001 on CD and cassette from Kid Rhino) titled "Dance and Sing! The Best of Nick Jr."; the CD includes songs from some of the most popular Nick Jr. programs, including Face, Nick Jr. Sings, Dora the Explorer, Little Bill, Maurice Sendak's Little Bear, Blue's Clues, Gullah Gullah Island, and more! Scored by Tanner "Bones" Jones.
Dora the Explorer is a popular Nick Jr show
we do not know if the show itself was popular 