Gatecrasher writes up at least eight occasions on which they've been spotted as a couple:
"A source close to the couple tells us Martone and Bass met shortly after Lorenzo started seeing Jacobs in 2008, but the two men's relationship has only heated up in the weeks since Jacobs and Martone said 'Bye Bye Bye.' … A friend of Bass confirms that the boy-band star and Martone are indeed seeing each other, but says the odds of the relationship lasting are about as long as those for an 'N Sync reunion.
'Lorenzo is trying to make it more than it is,' says the friend, who adds that Lance is just 'not that interested.' The pal also points out that Bass, 31, prefers to date guys who are 'younger and prettier' than the 31-year-old Martone. Ouch.
A spokeswoman for Bass says she does not comment on his personal life. Martone also declined to comment on 'personal matters.'"