Sticker Design From Existing Artwork

I have a single JPEG asset that needs a quick but precise makeover so I can turn it into a print-ready sticker. First, please remove the shadow sitting underneath the image altogether—no traces, halos, or loss of edge quality... (Budget: $30 - $250 USD, Jobs: Adobe Illustrator, Adobe Photoshop, Graphic Design, Illustrator, Photo Editing, Photoshop, Photoshop Design, Print Design)