Extensive near infrared monitoring of millimeter-wave / gamma-ray bright blazars

We established a sample of millimeter-wave and gamma-ray bright active galactic nuclei matching the WMAP catalog with the EGRET catalog, highest energy photons and the Fermi bright source list. We have monitored over 80 of these objects in the near infrared, obtaining over 2000 JHKs data points directly comparable with Fermi data. We present examples of correlated near infrared and gamma-ray activity of known blazars and recently identified sources.