erika miller took a trip to coshohawken, pennsylvania, for a behind the scenes look at the nation's biggest bridal chain. >> reporter: this valentine's day, we're going to talk about something sweet-- melissa sweet, a high end wedding designer who recently launched a mass-market collection at david's bridal. >> my gowns are very thoughtful, i like to think. they incorporate a lot of details in a very balanced way to create this subtle but very intricate story. >> reporter: she joins vera wang, who also designs a line at david's. the company's c.e.o., bob huth, says designer partnerships are key to growth. >> the more we are differentiated from a brand perspective and a design perspective-- we have something that says "i want that, i want him, or i want her"-- you win. >> reporter: the chain has come a long way since 1950, when davireisrg started a bridal boutique in fort lauderdale selling closeouts. now, david's is by far the nation's largest bridal chain with over 300 stores. one out of every three u.s. brides walks down the aisle in a david's gown. dresses start at just $99. today, all t