Possible Clues:

• 'TiK ToK' singer
• She sings "Timber"
• "TiK ToK" content creator?
• She had a 2010 #1 hit with “We R Who We R”
• Singer whose name once had a ''$''
• 'Die Young' singer
• One-named "We R Who We R" singer
• Pop singer once with a $ in her name
• Singer who lost her $?
• “We R Who We R” singer