I Believe We Can Remix is a song from the episode: New York, New York! part of the Irving: The Ultimate Phineas and Ferb Fan Club Promotional TV Show!!!!!
Ferb Fletcher: (with the voice of Clay Aiken) I BELIEVE - YOU - CAN!
Ferb Fletcher: It may sound dificult, but you shouldn't quiiii-i-iiiit!
Phineas Flynn: I Believe-
Ferb Fletcher: -we-
Phineas Flynn: -CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAN!