In the "Really Big Shrimp" movie, one of the movie titles shown playing at the Premiere Theater where Josh works is "Now She's Carly", a reference to cast member Miranda Cosgrove's new show iCarly (2007).
The layout of SpinCity Records is the same as the iCarly studio.
A flashback from The Amanda Show is used when Drake and Josh were fighting over the shrimp thrown by Penelope and Barney. This was intended as the series finale, but the final three episodes did not air in order.
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In the exterior shot of The Premiere, one of the fictional film titles on the theater's sign is titled "Now She's Carly". This is reference to Miranda Cosgrove and the character Cosgrove was to portray on iCarly (2007), which premiered a month after 'Drake and Josh: Really Big Shrimp' aired.