Christina Aguilera and CeeLo Green are out, and Usher and Shakira are in!

The singers appear in the season four teaser for The Voice, and it looks like they've already gotten to know each other ... and how to create a little drama! Blake is behind the wheel of a truck, and after picking up his new co-stars, the group squabbles about what to put on the radio. After finally settling on a tune, they start singing along together, and they just happen to pull up next to host Carson Daly on the street. Check out the clip above!