LOS ANGELES A fashionable red carpet for the premiere of “Let’s be Cops” in Los Angeles. The buddy comedy’s Jake Johnson and Damon Wayans, Jr looked dashing in suit and tie, while co-star Nina Dobrev donned a colorful, geometric-patterned design. Nina’s B-F-F Julianne Hough turned out to support the film, wearing a daring shorts ensemble and strappy sandals. NEW YORK CITY In New York City, Will Arnett signed photos for fans, and even did so from inside his S-U-V! Ali Larter stopped for the crowd outside Sirius Satellite Radio. We also caught up with T.I. who plugged his new album. T.I. #453438490 03 “yeah it’s coming out in September, late September, it’s called paperwork and motion pictures.” LONDON In London, Marion Cotillard looked lovely in Christian Dior for the UK premiere of “Two Days, One Night.” The Oscar-winner, who plays a woman set on saving her job, tells us how she embodied the complex character. Marion Cotillard 453456664 1:11 “we had a month of rehearsal..1:21 find her.” That’s the scoop. We’ll be back next week with more celebrity sightings.