I thought Jeanne Calment was the only person to reach 120 years:
She is also the only person verified to have lived for 120 or more years. The person who came closest to this age was Sarah Knauss of the United States, reaching 119 years, 97 days on her death on 30 December 1999.
Interestingly, she was a smoker too:
Calment smoked from the age of 21 (1896) to 117 (1992), though according to an unspecified source, she smoked no more than two cigarettes per day towards the end of her life.
She died aged 122:
On 4 August 1997, at 22:45 Central European Time, Calment died, aged 122. After her death, 116-year-old Marie-Louise Meilleur became the oldest recognized living person.