Ariana Grande is promoting her new song 'Petal' during the Eternal Sunshine Tour, which includes a concert in Montreal and a pop-up event in Los Angeles. She has also launched a mental health initiative for her tour crew and is taking legal action against hackers who leaked unreleased music and private content. Meanwhile, her new character 'Pepper' was introduced in a teaser for the 'Petal' visual, and her fanbase continues to grow with praise from artists like Gracie Abrams.