The freshly retired David Letterman was all grins Sunday as his IndyCar team paid tribute to the former "Late Show" host by putting a gap-toothed, smiling caricature of his face and #thanksdave on driver Oriol Servia's yellow car. "With everything that's happened, it's the highlight of my career," Letterman said. "It's crazy it's the Indianapolis 500. Regrettably my face, but also my name on that car. It's just delightful."

Dressed in a red shirt with a race sponsor "Steak 'n Shake" logo, he promised Servia he would buy the burgers with an Indy win.

Letterman, born and raised in Indianapolis, got into team ownership in the 1990s with former Indy 500 champion Bobby Rahal, and businessman Mike Lanigan came aboard to form what is now Rahal Letterman Lanigan Racing. Letterman struck up a friendship with Rahal after the retired driver appeared on his show after winning the 1986 Indy 500.

Also Sunday, the 10-man a cappella group Straight No Chaser sang a harmonized version of "Back Home Again in Indiana" a year after Jim Nabors crooned his final version of the ode to the Hoosier State. The song came just before Mari Hulman George urged the 33 drivers to "start your engines."

Surprise Palme d'Or winner at Cannes

The 68th Cannes Film Festival was brought to a surprising close Sunday with Jacques Audiard's Sri Lankan refugee drama taking the festival's coveted top honor, the Palme d'Or. The choice of "Dheepan," as selected by a jury led by Joel and Ethan Coen, left some critics scratching their heads. While the dapper French filmmaker has drawn widespread acclaim for such films as "A Prophet" and "Rust and Bone," some critics were disappointed by the thriller climax of Audiard's film. "Dheepan" is about a trio of Sri Lankans who pretend to be a family in order to flee their war-torn country and are settled in a violent housing project outside Paris. "This isn't a jury of film critics," Joel Coen told reporters alongside fellow jurors Guillermo del Toro and Jake Gyllenhaal. "This is a jury of artists who are looking at the work." His brother added: "We all thought it was a very beautiful movie," calling the decision swift. "Everyone had some high level of excitement and enthusiasm for it." Said Audiard: "To receive a prize from the Coen brothers is exceptional."

EUROVISION: Sweden beat Russia to win the 60th Eurovision Song Contest on Saturday, in an event described by organizers as beyond politics but marred by boos for the Russian that were apparently prompted by the Ukraine conflict and the Kremlin's anti-gay policies. Italy took third in Europe's iconic songfest, which this year carried the extra attraction of an entry by Australia. The race between Russian star Polina Gagarina and Sweden's Mans Zelmerlow went back and forth for most of the balloting as jurors from 40 countries voted along with a worldwide audience. Zelmerlow finally triumphed. Sweden's sixth Eurovision victory came 41 years after the Swedish group Abba's triumph with "Waterloo" launched their world career. Only Ireland has been more successful, with seven victories.