Late Saturday night the pregnant singer was rushed to the hospital thinking she was having contractions, but it turned out to be a false alarm. Yesterday, she tweeted, "So dem babies really wanted to celebrate with us [and] share the anniversary [Mariah's 41st birthday]. I started having contractions last night... Went to the hospital. Finally they said I could come home after they got it under control, but [the twins] almost came on 3/27 -- happy anniversary indeed!!! We have a few more weeks to go, but wow!!!" Mariah's birthday was on the 27th.