Ariana Grande is planning to take a step back from the public eye after the Eternal Sunshine Tour wraps, including dropping out of Sunday in the Park with George. This decision comes after the Grammy-winning singer has faced a wave of online commentary surrounding her health and body over the last year. Most recently, discussions intensified after the release of her new music video for her song “Petal,” with many fans pointing out her noticeably thinner appearance in the footage. “Ariana will be taking a step back from visibility after she completes the Eternal Sunshine Tour,” her rep shared in a statement to The Hollywood Reporter on…