Blogging Stocks - USA - After reporting a disappointing decline in second-quarter earnings and sales last week, Macy's (NYSE: M) is pulling out the big guns. Donald Trump and Martha Stewart are just two among a coterie of celebrities being employed in the department-store company's $100 million advertising blitz.

New television spots for Macy's - one of which will debut on September's Emmy-Award broadcast - will also feature R&B singer Usher, Tim Gunn from Project Runway, chef Emeril Lagasse, and hip-hop mogul Sean "Puff Daddy" "P. Diddy" "Diddy" Combs.

Also on the roster as a celebrity endorser for the Cincinnati-based retailer is Jessica Simpson. Seems like a

MTV.com - USA - It may be a long way from the muddy pits of Louisiana to the fashion runways of Miami, but Jessica Simpson made the trek in time to debut her swimwear collection Saturday night during Mercedes-Benz Fashion Week, shifting gears from her next film role to an entirely new challenge.

"My role at this fashion show is designer," Simpson told MTV News. She said she's been involved from the very beginning, "coming up with different fabrics and everything that reflects my personality and putting that into a bathing suit." She hand-picked the runway models that will be premiering a retro look, a