Download Dolly Molly by Right-clicking on her .
Save Target As, in the My Blobs, Blobs, Blue folder.

Surf the net and find a "face" picture of a "star".
Save Picture As, in the My Blobs, Import folder.
The star picture should now be visible as a sticker.

Make your Star Blob by applying sticker and paint.

Refer to Build A Bear notes to save starblob.bmp in My Documents.