During the Credits
About half a minute into the credits of This is 40, there is an extra extended scene shown from earlier in the film featuring the improv of Melissa McCarthy. It lasts about two minutes while Paul Rudd and Leslie Mann are shown not being able to stop laughing.
After the Credits
There is no stinger after the credits of This is 40.
Songs During the Credits
Special thanks to Richard and Denise Dragert Stanfa for the stinger submissions!