Once the cutscene ends, go to free roam, and you will receive another call from Franklin. After this second call, you need to return to your Agency, and you will notice a yellow mission marker outside Franklin's office. Walk into the marker and interact with it to start the mission 'Studio Time'.
Before you start the mission, stock up on armor and snacks. Get into Dr. Dre's car and drive it to Record A Studios.
When you get to the studio, stay inside the car and take out all the hired gunmen. Always try to keep your distance between yourself and the gunmen. They become aimbots at close range.
After eliminating all the hired gunmen, enter the studio. Equip a strong weapon before entering.
It is recommended to pre-aim as you move through the studio and keep looking at the mini-map for enemy positions. It is very easy to get shot and die here due to limited movement space.
Several guards in here have a shotgun that can instakill you, so be careful. Go forward and go through the first corridor to your left while pre-aiming. At least four gunmen spawn in here, one equipped with a shotgun.
Continue to move forward, and at the end of the corridor, there is a door to your right. Go through it, and you will reach the main studio lounge. You will come across at least five to six guards in here.
Be careful here as the corridor behind you is still dangerous. It can randomly spawn a gunman directly behind you.
It happened twice with us. We stayed in this area for a bit longer to heal up, but the randomly spawned gunman had different plans for us. Be careful of this small corridor area.
As you move forward directly into the lounge, three to four more gunmen spawn in here.
Go through the lounge and enter the third corridor across the lounge.
You will get two more gunmen in here.
At the end of the corridor, you will find four more gunmen in the room. One is equipped with a shotgun.
After clearing the last bit, you need to backtrack all the way to the main entrance. As you're making your way back, you will get one gunman in the lounge area.
And the last one will be in the small room at the end of the first corridor.
After eliminating all the guards, once again, go back to the same room you went to earlier, and you will see a yellow marker.
Walk into the marker, and a cutscene will play.
The mission will complete after the cutscene.
With Dr. Dre safe, it's time for the grand finale: Don't F*ck With Dre.