Conversation so far:
What happened in 2010 to Christina Aguilera?
In 2019 Christina Aguilera began work on her sixth studio album during pregnancy, when she frequently listened to electronic music.
How did Christina Aguilera's sixth studio album in 2010 do?
Critical reaction toChristina Aguilera's Bionic was mixed
What was negative about Christina Aguilera's sixth studio album Bionic?
Reviewers found Christina Aguilera's album Bionic forced and unnatural.
Did Christina Aguilera's Bionic have any positive reviews?
reviewers commended Christina Aguilera's experimentation with new styles in Bionic
Did Bionic by Christina Aguilera win any awards?
Bionic by Christina Aguilera peaked at number three on the Billboard 200 and has sold 332,000 copies in the US as of 2019.  The album spawned one other international single
How did Burlesque with Christina Aguilera do?
Burlesque with Christina Aguilera grossed US$90 million in the box office and received mixed reviews from critics, who found it clichéd but praised Aguilera's acting.
Did Burlesque with Christina Aguilera win an award?
Burlesque with Christina Aguilera grossed US$90 million in the box office and received mixed reviews from critics, who found it clichéd but praised Aguilera's acting.

Question: When did she join The Voice?
Self-contained rewrite: When did Christina Aguilera join The Voice?