Gotta Make Summer Last

Gotta Make Summer Last is a song used in the Phineas and Ferb episodes "Leave the Busting to Us!" and "That Sinking Feeling." It seems to play whenever the characters are on any sort of waterslide.

Lyrics
Summer, I love summer,

Give me that summer time,

Summer, every 86,400 seconds that pass...

Gotta make summer last.