HMX will want to get the 10's songs out ASAP as they will sell the best out of all 25 songs and there are 2 songs that were on a previous RB title together hence I predict:
Kelly Clarkson - "Stronger (What Doesn't Kill You)"
Avenged Sevenfold - "So Far Away"
Red Hot Chili Peppers - "Give It Away" (X)
Soundgarden - "Spoonman" (X)