The 'Coming Home' hitmaker explained the late singer - who was found dead in the bathtub of her Beverly Hills hotel room last Saturday (11.02.12) - will "truly be missed" as she was a person who was always filled with "joy".
He said: "Throughout the years, I got to meet her. She was so full of life. So full of just joy. She always made you feel that she noticed you and recognised you and spoke to you.
"She'll definitely, truly be missed."
The rapper also admitted he managed to bag an invite to Whitney's 1992 wedding to singer Bobby Brown - who reportedly introduced her to illegal DRUGS and repeatedly came to blows with the late singer - five years before he shot to fame.
Speaking about hustling an invite to the nuptials on 'The Ellen Degeneres Show', Diddy added: "When I was growing up in the music industry before I had success, I somehow got on her wedding invitation list.
"So I was at her wedding, but I didn't really know her, but it was one of the hottest things in town for the music industry.
"I got my name on there - me, plus one. I was just like, 'Oh my God! I'm at Whitney Houston's wedding.' I was a big Bobby Brown fan."