With a 100 episodes and counting, the Emmy Award-winning series “Phineas and Ferb” continues to roll out with new and thoroughly amusing stories for kids, tweens and families. In August, the hit animated comedy, increasingly renowned for its smart humor and noteworthy guest stars, will present two new episodes featuring the legendary recording artist Chaka Khan, multi-Platinum selling singer Clay Aiken (“American Idol”), Emmy-winning animator/writer Seth MacFarlane (“Family Guy”) and filmmaker Kevin Smith (“Clerks”).