There is a current commercal for Allegra featuring a young woman in yellow clothing with purple headphones, Allegra's signature colors. She's walking about with a somewhat angry look on her face, singing an apparently random song which we hear at times. Most of the rest of the time the audio is a voiceover about Allegra, yet we still see her walking toward the camera in closeup singing.
This combination of voiceover and a person saying (singing) different words is jarring and violates every rule I ever learned about good editing and good video storytelling. While it's good to play with ideas and see what breaking the rules looks like, I can't believe that this ad made it out of whatever review process it went through. When watching it on screen in a commercial break it really does look like a terrible error in the edit bay made it out to air.
I searched for a link to this ad and found this and also one on youboob. The comments on that one are universally negative and many share my confusion about why she is yelling at the camera while a different voice is on the audio track.
Allegra AD on iSpot TV