Jessie J signed copies of her new book, "Nice to Meet You," on Thursday (September 27) in London, England.
The singer picked out a purple and black leopard printed t-shirt by Christopher Kane styled with black skinny coated jeans.
Jessie added pops of color to her look with a red multi-faceted statement necklace, a bright red nail shade, a red lip shade, and dark red suede boots.
Straight locks and a bright smile wrapped up her look.
Jessie's top is also available in orange or gray.
Same top in different colors:
Similar tops by Christopher Kane: