|Name||Krisstina (Last name unknown)|
Krisstina is a singer who that Greg's school had at assembly because her lyrics are positive. According to Greg, Krisstina calls herself an "International Pop Sensation", but her world tour shows that she has never been out of Greg's state. Her lyrics and sayings are similar to those of Joshie. She only appeared in The Third Wheel.
- Diary of a Wimpy Kid: The Third Wheel (First and only appearance)
- Krisstina's song lyrics appear in Diary of a Wimpy kid: The Third Wheel. The chorus is: Trust in your dreams and you will see, just how happy your heart can be, reach for the stars and never stop! You're a winner, you'll reach the top!''
- Her lyrics are similar to Joshie, both having positive lyrics.