Lee Hyori became a sole singer in 2003. With her debut, her fashion and activity attracted public attention. She was so popular that 'Lee Hyori syndrome' was the highest keyword in Korea.
Lee Hyori acted the leading part in drama, named 'three-leaf clover'. Despite popularity of Lee Hyori, the acting ability was criticized.
'U-Go-Girl', her 3rd album's title music, gained public interest. And another music named 'Hey Mr.BiG' also became popular. These made Lee Hyori to the highest position. Now she is member of program which SBS broadcasts. She is a huge asset to the program called "Here come the 'family'", in which she was praised to have shown her cool, honest personality.