A smell-a-like is a perfume that smells like a designer fragrance but with a different name and packaging, and at a cheaper price. A smell-a-like isn't an exact copy, but often smells very similar.
I haven't tried this but just read that
XOXO Heartbeat is a dupe for Addict.
I haven't been able to compare directly with the real thing thus 4 stars but this is one of the stronger PP oils and from memory it smells similar (possibly a bit stronger!)