Before the Brazilian Grand Prix, loads of people thought Lewis Hamilton was about to become the first driver to win the world title in his first season.
The McLaren driver started the race in second position on the grid and four points ahead of his nearest rival - team-mate Fernando Alonso.
Ferrari's Kimi Raikkonen (second left) and Fernando Alonso (second right) were the only drivers who stood a chance of beating Hamilton in the championship race.
They're off! Raikkonen overtook Hamilton going into the first corner, but his Ferrari team-mate Felipe Massa kept his place in the lead.
Behind them, the McLaren drivers competed for third position. Alonso made it through and a mistake by Hamilton saw him drop to eighth place.
More trouble for Hamilton during lap eight as he struggled to find his gears and fell to the back of the pack.
As Hamilton tried to race his way back to the front, Raikkonen took the lead and went on to win the race. That meant Hamilton had to finish fifth or higher to walk off with the title.
Alonso could have got his third title in a row if he came in second, but he ended up finishing third behind Felipe Massa.
Hamilton eventually finished in seventh place, meaning Raikkonen won the Brazilian Grand Prix AND the Formula One driver's championship.
The 28-year-old Finn said he always believed Ferrari could win: "It was perfect teamwork from the team and it paid off - not only in this race but all season."