Dr Pepper produced by They Might Be Giants. Several ads for Diet Cherry Vanilla Dr Pepper appeared on television in 2005. In one, a young woman on a blind date at a restaurant, who sips into the beverage, suddenly makes her date, restaurant patrons, and even a waitress all part of a musical sequence involving The Muppets version of the song "Mah Nà Mah Nà". One campaign features the Queen song "I Want It All". On January 1, 2008, the company unveiled a new TV ad campaign featuring the "Cheers" theme song ("Where Everybody Knows Your Name") performed by Gary Portnoy. In
Daniel A. Portnoy Pennsylvania, where he collaborated with Dr. Lewis Tilney in the Biology Department and made the observation that "L. monocytogenes" spreads from one cell to another by exploiting a host cell system of actin polymerization. His lab also defined the role of the listerial hemolysin in mediating dissolution of phagosomes. In collaboration with Dr. Philip Youngman, he showed that expression of the "L. monocytogenes" hemolysin by "Bacillus subtilis" led to its growth inside of host cells. Dr. Portnoy collaborated with Dr. Yvonne Paterson, who also arrived at Penn in 1988, on the use of "L. monocytogenes" as a recombinant vector-based vaccine