"Wake Up Your Heart" is the second Japanese ending theme to the anime series Yu-Gi-Oh! GX. The song is sung by the voice actor of Jaden Yuki, KENN along with his Japanese band called The NaB's. Maeda Katsuki composed the music, while the lyrics were written by The NaB's themselves. There are two slightly different versions, featuring characters from the appropriate season. It was followed by "Sun".