Aaron Carter insists he's not obsessed with Hilary Duff.
The 26-year-old star, who dated the 'Chasing the Sun' hitmaker, 27, when she was 13, hit back at critics for suggesting he is still pining after her because he posted a photograph of himself watching an old episode of her Disney series, 'Lizzie McGuire,' in which he kissed her, on Instagram this week.
He wrote on Twitter: "It's not my fault that @DisneyChannel was playing my episode of 'Lizzie McGuire' while I had some time to watch TV the other night.
"All of these jokes aren't funny anymore. Let it go because it's starting to creep ME out now."
The former couple dated for two years until 2003 and Hilary, who has a two-year-old son, Luca, with estranged husband Mike Comrie, recently admitted she felt "uncomfortable" when Aaron declared his love for her in March.
Speaking about him in October, she said: "It's...ugh! I don't know. I don't know what to say about it!
"It [our relationship] was so many years ago. I literally haven't seen him ... so, it's uncomfortable."
The 'Crush On You' hitmaker called Hilary the love of his life shortly after she announced her separation from Mike in January.
He tweeted at the time: "I'll spend the rest of my life trying to better myself to get back to her. I don't care what ANY of you think.
"Don't be that stupid douche that loses the love of your life forever... Like me..."
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