Lindsay Lohan will celebrate her 21st birthday with a gaggle of Paris Hilton lookalikes to take the place of her incarcerated pal, according to reports. The Mean Girls star is alleged to have hired a group of doppelgangers for her 2 July (07) bash as a tribute to her pal, who returned to jail on Friday (08Jun07). A source tells Scottish newspaper The Daily Record, "Lindsay knows Paris can't make it, so, in her honour, she has invited lots of lookalikes. "She thinks it will cheer Paris up and make her laugh."