hmmh just mixed a track in the headphones and when I play it on my laptop speakers... I hear a high freq buzz that may be related with phasing... I am not aware of that when I listen through my headphone...
SoundClick artist: B.A.S.E - RnB - page with MP3 music downloads
Bottom line : mix through both headphones and monitors... and maybe only monitors is sufficient
(for your information I have beyerdynamics dt770 pro)