The 18-year-old singer, originally from Zimbabwe, was named as the winner during Saturday’s episode of the ITV talent competition.
She saw off competition from Jonny Brooks, who was coached by Sir Tom Jones, in the final.
Blessing sang Robbie Williams’ Angels and James Bay’s Hold Back The River in the final.
The latter song was a duet with her mentor Olly Murs.
WATCH: Blessing Chitapa's performance of Angels in the Voice final
A tearful Blessing, whose parents are pastors at the Cornerstone Fellowship International Church, in West Bromwich, said she is “so happy to have sung on this stage”.
“It has been an honour and my privilege and it has been unforgettable,” she added.
After she sang Angels, Murs said: “You are just a phenomenal talent and even I’m getting emotional here after that performance.”
Earlier in the series, Murs became Blessing's mentor after he was the only judge to turn his chair during her audition.
Blessing said winning the competition “is my biggest achievement yet”.
“I am so proud of how far I have come and I’m so intrigued to see what the future holds for me,” she added.
The final also saw a performance from Celeste, who performed her song A Little Love.
The programme also saw coaches Sir Tom, Will.i.am and Murs give a rendition of Sir Elton John’s Saturday Night’s Alright For Fighting.
Blessing has recorded Angels as a single, which is available to download and stream.
Filming of The Voice was paused earlier this year because of coronavirus.
However the programme returned to television screens in October following a seven-month break
Blessing was chosen as the victor by the programme’s virtual audience, who voted for her to win.