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Perry added: "You have to get creative with it. Some artists don't care though, and you can tell."

Her comments sparked speculation she was lashing out at Spears, who was recently reported to have earned $500,000 from endorsing products during her promo for new song Hold it Against Me.

But the I Kissed A Girl hitmaker is adamant she wasn't targeting her pop peers, admitting she's "happy" to take on corporate sponsors.

In a series of posts on her Twitter.com page, Perry writes, "Please note I expressed an overall feeling about product placement, their roles in vids & the art of them being complimenting or sticking out. Most, if not ALL popsters welcome deals w/products to offset costs of big budget vids in these recessional music industry times.

"I've used them in MY vids before & am happy to be able to make a better vid because of (product placement). Once AGAIN, stop pitting artists against artist for ur (your) sensational satisfaction."