Bell bottom jeans are going to be big for spring, so I embraced that style along with a pair of great platform sandals to give her an outfit that is both sophisticated and on trend. I think the floral print top is fantastic, I love the colors and floral is always great for spring as well. Top things off with a light colored (faux) leather jacket (which has a ton of great reviews!) and some earrings and you're all set! I also think all of these pieces are wonderful on their own and would mix and match easily with different items she may already own.
If you don't like the bell bottom look, I'd suggest some straight leg or more subtle bootcut jeans. I also threw in a few less expensive shoe options (although I love the Miu Miu lookalikes in the set above).