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