Romney’s offering solutions, Obama offers self-absorbed ego-maniac celebrities. The choice is clear.

MILWAUKEE (ABC News) – After thousands of ads, hundreds of stump speeches and a record war chest of campaign cash, President Obama is banking on a final burst of star power to boost his get-out-the-vote effort in the final 72 hours of the 2012 presidential campaign.

As Obama and his top surrogates – Vice President Joe Biden, first lady Michelle Obama and former President Clinton – barnstorm the battlegrounds this weekend, they will have a cast of Hollywood stars and music icons at their sides.

The pairings are aimed at driving turnout, particularly among young and minority voters, while bolstering enthusiasm in a handful of key states where polls show the presidential race very close.

Here in Wisconsin, Obama will be joined by multi-platinum singer Katy Perry, who appeared with the president at a midnight rally in Las Vegas last week wearing a white “ballot” dress. Later in Dubuque, Iowa, rocker John Mellencamp will perform, and actress Kate Walsh of ABC’s “Private Practice” and “Grey’s Anatomy” will address the crowd.

Dave Matthews will open for Obama at a late-night rally in Bristow, Va., where the president will also unite for the first time on the 2012 campaign trail with Bill Clinton.

The celebrity tour continues Sunday with Latino rapper Pitbull joining Obama in Hollywood, Fla.; soul legend Stevie Wonder performing at a rally in Cincinnati; and Dave Matthews making a second appearance with the president in Aurora, Colo.

Biden will tour Ohio on Sunday with pop singer Jason Mraz, stopping in Lakewood, Fremont and Lancaster. Michelle Obama will stump in Orlando, Fla., Monday with Ricky Martin.