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With the 2012 college graduation season nearly wrapping up, and the unofficial start of summer just days away, we thought that now would be a good time to round up clips of all of the fantastic celebrity commencement speeches that have taken place so far. From Mayor Bloomberg’s topical response to North Carolina’s referendum banning same-sex marriage at UNC Chapel Hill to Andy Samberg’s much more lighthearted (and impression-filled!) appearance at Harvard — as well as contributions by not one, but two Obamas — you’ll find a treasure trove of interesting life advice from some of pop culture’s biggest names after the jump. Check out the videos, and let us know in the comments who you think needs to quit their day job and become a full-time inspirational speaker.

Michelle Obama at Virginia Tech University, May 11

The money quote: “The truth is graduates, there will always be folks who make judgements about you based on superficial things like where you’re from or what you’re wearing or how you look. There will always be folks who judge you based on just one thing that you say or do, folks who define you based on one isolated incident. And here at Virginia Tech, I know you all know a thing or two about what’s that like. But you also know that in the end, people can only define you if you let them.”