Justin Bieber Buys Kobe Bryant Tribute Art

Justin Bieber is adding to his growing cartoon art collection ... with a tribute to Kobe Bryant ... complete with imagery of the Black Mamba balling out with the Lakers.

Our sources tell us Justin's team reached out to Idiot Box Art owners Emily Bright and Tamara Martin to purchase their newest original piece honoring Kobe ... and the Biebs snagged one for only $1,200.

The cartoon art -- depicting a teddy bear wearing Kobe's #8 Lakers jersey over a Mamba hoodie and some Nikes -- is made of hand-cut wood covered in acrylic paint and finished with a coat of resin. The piece is one of 5 created, and it's 41.5 inches X 24 inches.

We're told the Kobe art sold out in a few hours ... so the artists are making miniature versions for $200 a pop, and they're going on sale February 6 and 7 with 24 percent of profits going to the MambaOnThree Fund.