You will Watch Phineas and Ferb Season 4 Episode 10 online for free episodes with HQ / high quality. Stream cartoons Phineas and Ferb Episode 10 Phineas and Ferb’s Musical Cliptastic Countdown Hosted by Kelly Osbourne. Dr. Doofenshmirtz and Major Monogram have their hearts set on revealing the top 10 musical numbers from Seasons 2 and 3, but soon find out that celebrity host Kelly Osbourne has been brought in to fill the role. Unwilling to submit to playing second fiddle, Doofenshmirtz makes it his mission to thwart Kelly until Perry the Platypus sets out to stop his nemesis from ruining the entire show. Maia Mitchell (“Teen Beach Movie”) also guest stars.