Alli and the Ambulance Arrive at Brit's
Alli Sims was all smiles when she arrived at the chaotic scene surrounding Britney's home -- and had to cover her mouth to block her cheek-splitting grin!
![](https://cdn.statically.io/img/imagez.tmz.com/image/bd/16by9/2016/02/25/bd1153dae4ae5d089f2df151cf16006d_md.jpg)
The ambulance showed up shortly after -- led by a team of motorcycle cops to assist in Britney's transport to the UCLA Medical Center.