If you are not limited in your music choices, talk to the musicians you hired about your options.
You can choose a theme so that all the songs are related to another - love songs, the same artist, show tunes (that's what we did and it turns out my parents also chose show tunes). And remember to select songs that have a special meaning to you or the people that are walking down to them. At my sister’s wedding I walked down to the theme from Gone With the Wind because I’m a huge GWTW fan.
There are tons of wedding web sites that have ceremony processional song ideas, but you can really use anything you like. My brother-in-law walked down the aisle at his wedding to the theme from Rocky.
So think outside the music box and be creative with your processional choices. And definitely choose a fun song for your recessional too!