Hunter Hayes tweeted a picture of this Yorkie late in 2010, but it's not 100 percent clear that it's his pup. "We even have an official studio Dog! Ladies and gents, meet Charlie!" Hayes said while recording songs for his self-titled album. Surely he wouldn't leave a dog this cute locked up in a recording studio for its entire life, would he? Of the breeds that travel, Yorkshire Terriers are tops.