I really enjoy singing duets by myself...  Here are a few of my favorites:
CLICK THE + SIGN AFTER THE SONG TO FIND IT ON MY SITE


All I Ask of You +
A Time for Us. + 
Beside the River (Zai Shui Yi Fang)
Bella Note +
  
Can't Sleep Tonight (Jin Ye Wu Mian - Chinese Opera style) + 
Guiding Star (Xing) +
Have to Say Goodbye (Xiang Jian Shi Nan Bie Yi Nan)   +
I Love Northern Snow (Wo Ai Ni Sai Bei De Xue) +
I Really Miss You  (Zhen De Hao Xiang Ni) +
If I Can Dream +
Memory +
Merry Widow Waltz +
Moon River +

Moscow Nights (Moscow Wan Shang) +
My Heart Will Go On +
Phantom of the Opera +
Place of Puppy Love (Chu Lian Der Di Fang) +
Red Dust Hotel (Hong Chen Ke Zhan) +
Running +

Sheep Herding Song (Mu Yang Qu)  +
Speak Softly Love + 
Tears of Love (Ai De Lei Zhu)+

The 365 Mile Road (San Bai Liu Shi Wu Li Lu) +
The Butterfly Lovers (Hua Die) +
The Colors of the Wind  + 

The Flowers are Beautiful, The Moon's Ful (Yue Yuan Hua Hao) +
The Moon Represents My Heart (Yue Liang Dai Biao Wo De Xin) +
The M
usic of the Night +
The Sea is My Hometown (Da Hai a Wo De Gue Xiang) +
Tonight I Celebrate My Love For You +
Universal Song (Tong Yi Shou Ge) +