Bagpipe music all sounds alike to most people. There are really only 3 tunes. Scotland the Brave(StB), Amazing Grace(AG) and "that other one". I'm trying to remember if I've ever been asked to play something else by a non-piper. To add to the confusion, most people don't know the name of Scotland the Brave. They know the melody, but by some other name. Most of the time, if someone does ask for something else, you can play Scotland the Brave and they'll say "That's it!" Most pipers don't really enjoy playing StB or AG, but do it because that's what people want. Like Elvis used to tell his band "We may be sick of Hound Dog, but that's what the crowd out there is paying for." Or words to that effect.

As a side note, there are no bagpipe songs. Songs are the things you sing with your voice and they have words to them. Instruments only play tunes. Melodies with no words. The "Eyes of Texas" is a song. You sing it to the tune "I've Been Working On the Railroad".