The teenager said 27-year-old Bo "deserved" to win the competition more than her or anyone else left on the show.
"Its been an a amazing experience, brilliant. You've got to live every moment of it," Becky said this week.
The 18-year-old revealed she had never felt that becoming a singer was possible, and instead focused on perusing a more "realistic" career in sound engineering
Even though she's now made it all the way from the auditions to the semi-finals, Becky still feels as though she doesn't deserve to win.
"Bo is so lovely," Becky explained. "She's a posh lady but she's so down to earth."
Speaking to Hello magazine, Becky added: "She deserves to win more than anon else in the competition."
[cat]The Voice UK[/cat] semi-finals air this Saturday night on BBC One.