HAYDEN Panettiere booked an extra hotel room in Miami for New Year’s — so people wouldn’t suspect she was sharing a room with her boxing-champ boyfriend. The 5-foot-1 “Heroes” star was spotted at the Setai with 6-foot-6 heavyweight Wladimir Klitschko, but asked her aides to book her a room at another hotel. “It was quite clear she was with Wladimir, and they were at the Setai together,” a source told us. “But she insisted on booking a room at a separate hotel so she could pretend she was staying elsewhere. The room was never used.” Panettiere, who was spotted hanging out poolside with the ring giant, has a history of pretending she’s unattached. She repeatedly claimed she was “just friends” with “Heroes” co-star Milo Ventimiglia until they split after more than a year together. Other guys she insisted were “just friends” include “Entourage” star Kevin Connolly. Panettiere’s rep didn’t get back to us.