Well, apparently MITXT doesn't like common time, but it worked when I did it in 4/4. Here's the tune:
ABC format:
X:1
T:Where Did You Get That Hat?
M:4/4
Q:1/4=120
K:C
GCCEGccc|ccGFEED2|-DDDD/2D/2DAdd|dcBGABAG|
-GGecdBcA|GEFGAcD2|-DECCEGcc|cGEFEDC2|-C2C2EGcc|
cccGECD2|-D2DDFAdd|dcBGA^FG2|-G2ecdBc2|G2AcGED2|
-DDCCEGAA|GFEGFDC2|-C3/4||