Ads as Music Videos

This is less of a criticism and more of a question: what is with television commercials turning into music videos?

I first noticed it with the Nivea "Kiss and Be Kissed" campaign. In the beginning of each of the spots, text appears at the bottom left of the screen:

Duffy for Nivea
"Insert Name of Song Here"/Rockferry

THEN... I was watching The Soup (LOVE LOVE LOVE) and saw P Diddy's commercial for Cîroc, and, crazy enough, the music video phenomenon popped up again! This time, Diddles (my pet name for Puffy) used Frank Sinatra's "Come Fly With Me" to show off his Rat Pack-like lifestyle and to peddle his unimportant swill:



So... are artists requiring that their names be put on commercials now? Or, do the clients/agencies want the equity from the celebrity's name added to their products? I'd say option B seems to be a more likely scenario, but I obviously don't know, so please tell me your thoughts.

P.S. Diddles: you are SO not as cool as Frank, so quit trying.