Pop star Justin Bieber failed a sobriety test at the scene of his DUI arrest in Florida on Thursday (23Jan14), according to police. The Baby hitmaker, who was driving a rented yellow Lamborghini sportscar, was detained by cops in the early hours of the morning after allegedly taking part in a drag race in Miami Beach. Police spokesman Bobby Hernandez has now confirmed the 19 year old was arrested on suspicion of driving under the influence (DUI) and drag racing after he failed a sobriety test. The other driver allegedly involved in the race was also arrested. Bieber was taken to Miami Beach police station for further tests and processing. He is expected to be booked at Miami-Dade County jail later on Thursday. Photographs of the star and a female friend, reportedly model Chantel Jeffries, in the sports car appeared on the star's Instagram.com page shortly before his arrest. Another image showed the singer and a pal posing in front of red and yellow Lamborghinis. The pictures have since been removed from the website.