Due to being widely criticized by the protesters of the Chilean social outburst, along with several other controversies, Karol temporarily retired from being a public figure.

His parents Nancy Venegas and Fernando Lucero named him after Karol Wojtyla (Pope John Paul II), as he was visiting Chile at the time.

In 2004 he graduated from the Liceo Andrés Bello, giving the final speech of his generation and receiving honors.

[2] In May 2008, he received an invitation from Chilevision's Yingo production to join the cast of the youth program and subsequently signed a contract with the television station.

From the start of 2008, Lucero has been a consistent panelist on the Radio Carolina program Pegao' a las Sabanas.