Michael Phelps took his wife and his fetus out on the town on Tuesday -- treating the gang to a OneRepublic show!
Earlier that day, Nicole Phelps announced she was preggo with baby #2 -- but it wasn't until she hit the concert that she decided to show off her baby bump.
The Phelps' got to hang backstage with the band before the Phoenix show -- and tweeted about it, "These guys were amazing to see live the other night!! So talented!!!"
He's right. Counting Stars is a good song.
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