Parrot, in a way

• One with nothing original to say
• Copycat
• One who repeats
• Parrot, often
• One that's imitating diva, framing 'Love' with Red Heart on top
• Mimic
• One expressing the same thoughts

Wiktionary Word definitions in Wiktionary
n. One who, or that which, echoes or repeats something back.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Echoer \Ech"o*er\, n. One who, or that which, echoes.