Pumped up Kicks did air in the midnight hour of Tuesday. It hasn't aired since.
Two new songs played this morning that don't look like they've ever been on during this current format:
Erasure - Chains Of Love (1988) played this morning during the 7 AM hour.
The Divinyls - I Touch Myself (1990) played during the 9 AM hour.
Weird. They play Walk by Foo Fighters (2011) & Pumped up Kicks by Foster the People (2011), in the middle of the night, seemingly never to be heard again. Then they start playing some older songs that are new to the format change.
Gwen Stefani - The Sweet Escape (w/ Akon) just played as I was typing this. It doesn't look like that song has been played since the format switch either.