Selena Gomez, Olivia Wilde and Sophia Bush all know that accessories can make the perfect outfit even more over-the-top, but it's not necessary to have a celebrity-sized pocketbook to copy their look.

As Us Weekly Fashion Director Sasha Charnin Morrison explains, stunning costume jewelry and one-of-a-kind accessories can easy be found at resale boutiques -- if you know what to look for.

Pointing to celeb favorite jewelry collection House of Lavande -- which features pieces from the 1920s, 1950s and beyond -- for inspiration, Morrison says that when shopping for jewelry, bigger is always better! "You want something that's huge -- a statement piece," says Morrison, adding that the right investment piece, regardless of the material it's made of -- can be worn with practically anything in your wardrobe.

For more of Morrison's tips to snag one-of-a-kind costume jewelry, watch the video above now!